Surface RT
I've got two Surface RT tablets in my household, one for myself and one for my wife. She's a published author, and she's been using the Surface since last week when she got it. I've shown her how to use it with SkyDrive and have access to the work she did using her desktop PC, something that she thinks is pretty cool. For myself, I just wanted to have a Windows RT device so I could really talk to the similarities and differences between RT and Windows 8 when someone asked about them. My experience has shown that the similarities are much more the story than the differences - the functionality is very much the same between the two classes of devices, allowing for the differences in focus.
We use our two Surfaces with the Type Cover, which is superior to the Touch Cover for most touch typists. Beyond that accessory, we've gotten sleeves and I'm using a 64 GB SDXC microSD card I got from Amazon. Having Office applications on the tablet by default is a huge advantage as far as I'm concerned.
The Surface RT is not without some quibbles. For instance, out of the box there's no desktop client for SkyDrive, so you don't have offline storage as you would on a full Windows 8 PC. That can be worked around by mapping your SkyDrive folder to a Network Drive and then copying files from that to a local folder, if you need that sort of access. It's not a huge challenge, but it is inconvenient. Beyond that, there are some types of apps that are in short supply in the Windows Store, but that's changing day by day. And finally, if you need LTE 4G service, a MiFi type unit is probably the best choice.
In short, the Surface RT is a worthwhile device if you understand the limitations of the ARM platform. I would recommend the Surface RT tablet to anyone looking for a companion device to their main Windows computer. Ours have proved their usefulness, and I think other users would find the same thing themselves.