Last I looked, the Android phones and tablets were the only ones that do multitasking. Is that still true, and in how far is that noticeable? Because at least half the handy stuff I can think of needs to run in the background.
I only have a simple phone, because I think the screen of smart-phones is too small to be really useful, and for most of the stuff you might want to do with it, I want a keyboard or other useful way to enter text.
I think Asus got it again: I'm looking at the Eee Pad Slider and Transformer as being useful: The slider is small (carry-able) and has a built-in keyboard, while the Transformer is full-size but has a detachable keyboard.
Both also use the much more practical 1280x800 resolution as opposed to 1366x768: you can fit a standard-size page readable on the first, and not on the latter. Which is what I expect from a tablet; I'm more likely to use it as a book or other printed page replacement, than I'm to use it to watch video.