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Still in beta, but once it's available, i think Synergy will be another option. Certainly works well on non-tablet PCs, will be interesting to see how it extends to tablets.
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Contributr
I'll look for it once it leaves beta and maybe do a follow-up down the road.
I'm more interested in using my tablet as a touch input for my desktop system that will be running Win8. The tablet would display the same screen that is on my desktop and allow me to manipulate it with touch rather than using a mouse. The virtual keyboard should also work. I have been experimenting with several apps that do this, once they can do all the touch variations that win8 supports they will be very usefull.
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Contributr
Will achieve this goal, provided that your Windows box is configured to allow remote administration. The problem with these apps is that the traditional Windows interface is not intuitive for touch screen finger input. Windows 8 will probably do a lot to address this, though.
I am a teacher who would like to carry a tablet (I am waiting for the windows surface to come out) around my classroom and be able to project what is on my tablet through an LCD projector. My desktop is connected to an LCD projector. Is there anything out there that can accomplish this? It would be great to be able to teach from where my students are sitting or have students answer questions on my tablet and be able to display them.
In this document I'm trying to describe extending a Windows or OS X desktop to the LCD display of a tablet - using the tablet's LCD as an external monitor for a PC - the reverse of what you're trying to attempt.

What you are trying to do can be achieved fairly easily *provided* that your tablet has a video out port on your device. This usually means an HDMI port on most modern devices. The ASUS TF101, TF300, and various other Android tablets, and even smart-phones, have HDMI out ports. The Apple iPad model lineup has a dongle that you can purchase separately that will enable HDMI output. It costs about $30.

With an LCD projector, you most likely need an adaptor or cable that converts the HDMI signal to an analog signal. This can be a little tricky - as HDMI wants a direct digital connection between the device and display. This is designed to prevent piracy - there is a digital "handshake" between your device and the display that prevents you from copying media like movies. Your best bet is to go right into some sort of HDMI display. Your school IT Staff may be able to help, or if you have an AV department or program (assuming you are a high school or college), one of the students there will probably be more help to you than I could ever be. I'm not really an AV expert.

The staff of Tech Republic uses iPods for video presentations on a regular basis. I'll ask around and see if any of them can provide some additional tips - but I think I've pretty much covered the basics here. The good news is even though it may sound complex - it is a lot easier today than it used to be to get your video from your device to an external display.

If you have large flat-screen TVs at your school, they're almost certainly HDMI capable. In that case, if your tablet has HDMI port, literally all you should have to do is plug in the cable and connect the two devices, and your display will redirect to the larger screen.

Let me know if you have any questions or need further assistance. I'll be glad to help in any way I can.
Are there any tablet-application combinations that allow wired connection for the 2nd display. Is HDMI bi-directional? If so, then this should be possible, with a lag that is non-existent.
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Contributr
I've never heard or seen of anything like this - and I've always suspected this is why Apple's proprietary dock has an advantage over USB/HDMI connections for third party docking solutions.
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I have ScreenSlider, it works great for my android on PC. I have 4 additional androids and would like to have several of them up simultaneously. Its great to have on my laptop when working remotely, and is more of a novelty by my main work station's dual 22" monitors. I'm even thinking of using my old devices sculpturally. I could have the older phones stripped and embedded into a piece all hardwired for power and soldered together. Had been thinking for years on how to just use the screens, but this could be much coolerish.
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idisplay provide nice tool for images, I have also tested novisign.com digital signage slides presentation on android. There is sure many opportunities in this display market. Donovan thanks for sharing this info with us
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The tablets are the best in the whole world . The specifications are the best . Their speed are very nice and its working are the best.
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