Hey, its going to be too heavy? Cripes, I'm an old man with enough dissabilities to warrant a handicap parking permit. And I'm the one that's wanting the extra weight.
Maybe you have the extra cash to have a couple three different kinds of machines, one for work, one for gaming, one for communications, one for school, but I don't. While I always like to have back up machines, so if something goes wrong I can send the bugger in without bringing my entire work schedule to a stop, what I need is nearly an identical machine, not some lightweight fluff.
While I grant there's probably a market for this and other similar machines, I am pretty sure the problem with acceptance of Tablet PCs has been they are so lightweight. The tech is old, the power is minimal. So it weighs a few pounds less. Big deal. If I am carrrying around my laptop, I am not carrying it in my hands, its in a backpack with good padding all around so my hands are free, one for the cane, the other for something to hold on to (used to be one for the ship the other scratch myself, but those days are gone). If its in a backpack, a couple of extra pounds or inches don't mean much.
And Myrkat is right. Those that are wired, they are wired already. Those that aren't, they aren't interested. My mom was actually afraid of her VCR and didn't feel comfortable with transistor radios, but we got her a MacIntosh and she took off on it. Her next down sister, not interested, under any conditions, period. The youngest of the three, she's one of my most prolific correspondents. Three people, same upbringing, same generation, two took to it, one did not and will not.
Its time to move on, lets use the power. If you want something really portable, get a PDA. Heck, in a year or so, your cell phone will boast a P3 and 128 MB ram with an upgradeable GPU, DX8 at least!!