It's amazing what a difference a decent virtual keyboard can do. iPad has the second best KB IMO, Touchpad the best. GalaxyTab's KB is bad.
Surprisingly, there were not that many tablet-only apps for Android Honeycomb, but more of them were big name than Touchpad.
Until the screen went out on it the hardware of the GalaxyTab was impressive, light weight with a very high res screen. If you could marry webos with more state of the art hardware, like HTC or Samsung can produce, I think webos could give Apple some serious competition.
What I would really like to see is a webos, slab style phone. I want that more than a tablet.