My Windows 8 Ultrabook that I've mentioned, it is plugged into the wall outlet right now. Which means another thing I have to carry with me throughout the day.
The advantage to my ASUS TF300 is that I can leave the house with a full charge and complete confidence that the battery will get me through the entire day even under the HEAVIEST of use. With Intel based PCs I generally buy extended cell batteries and extra wall transformers that I'm religious and fanatic about packing with me. I hate ending up behind the gate-terminal at an airport plugged into an AC outlet on a support beam stealing electricity from the airport. I hate *hoping* that my flight will be one with AC outlets in the armrests. I hate having to be an AC nomad always looking for the next watering hole and knowing if I don't find one I may end up dead in the water until I can.
That is ONE reason long battery life/long standby mobile devices are so popular. It is one of the reasons the Macbook AIR is so popular and inspired the Intel Ultrabook concept. That is one of the reasons that Apple is so popular and that Apple users are dismissive of other platforms including Android. Apple has battery efficiency down to an art.
Being free from the need to tether is critical to people who travel a lot. The minute I have to drag along more cables... ethernet, AC, etc... the worse things get for me. Battery life is one of the big ones. I'd rather have 16 hours of battery and not need it, than to have 3 hours of battery life when I was promised 6 and need 12.
And this doesn't just apply to professionals and road warriors. Students may leave at 5 in the morning for class and not get home until 5 that evening, going from class to class, lab to lab, a long break in the middle of the day studying in the library or at a coffee shop. Trying to find some communal public AC is just a *hassle* in that environment. Which is why students also like a device that they can leave the house and come back 12 hours later and use their device all day on that single charge. That is the benchmark we're working toward on these devices. I've got to sleep eventually, as long as my device can stay awake longer than I can, it can charge when I sleep. That is what Apple devices and Android devices strive to deliver, it is what Intel strives to deliver, and it is what Microsoft needs to strive to deliver.
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