iPad is the iPad killer.
I’ve known a ton of people who bought one and have subsequently got rid of it. Truth is, the fact that they won’t support some basic things like Flash are slowly killing them over time.
Oh, that and the fact that they filter results for sites like youtube.com so there are certain results you CAN’T get on an iPad that you can get on a PC. Talk about control freaks.
HTML 5 might render irrelevant in the very near future, so BFD.
Point is, if you have a use case for a tablet, a tablet is what works for you. If you have a use case for it. If you think it's going to bake your bread and mow your lawn and render every other computing device and smart phone you have in your possession null and void, you're going to be disappointed and give the tablet up.
If there weren't valid use cases for tablets, and if device makers didn't think they could make money off those use cases, device makers wouldn't be killing themselves just trying to get up to par with iPad. They're doing a lousy job trying to keep up to par with iPad, but hey, that's show business.
Some other poster already said it: Honeycomb is the thing to watch in this space.