I really think that tablets are designed for "normal" users, not the types of folks who read Slashdot. Jason might disagree as an iPad owner, but I think that that typical geeks (not Apple ones) are the types that couldn't stand to not have root privileges on a system they own on principle.
So it appears that most geeks aren't buying tablets because their restricted functionality isn't what we're into. I can't code or write my LaTeX thesis on an iPad, so it's not useful to me, while my MacBook Air is practically iPad-sized and gets me everything I need.
The moral of the story is the next time you see a bunch of geeks viagra cialis online pharmacy pharmacy bashing tablets as useless and, more to the point, the people who by them as stupid, please remember that these geeks are not the intended audience. Give them a cookie and a nap and they'll be back to arguing that "Opera is the superior browser and why don't more people use it?" in no time.