don't see the appeal of tablets, personally, except maybe as a glorified home theater remote and a pure web browser. Personally, if absolutely love my 12.1" thinkpad x series notebook. It's 3lbs, and i can sit with it in bed for hours and it doesn't get hot. I can read my email and RESPOND to email. I can type on a full keyboard without having to change positions. Since the base rests on my lap, i don't need to use my hands to constantly hold the (reflective) screen at the right angle. I can carry the thing around without really noticing it. (I used to hate my 5 lbs notebook though). It's fucking FAST. I can run any program i want on it and do real work.
I have an iphone, a blackberry, a 13" tablet notebook pc, the 12.1" thinkpad x series, and a kindle. I wouldn't ever carry anything bigger than an iphone on a daily basis. Sometimes i carry my x series. I always carry my kindle. I wouldn't have a real use for a tablet. You can't even use SF well with a tablet.