Hitting the home button to get around quickly isn't that bad at all. I can switch pretty fast.
One thing about that article regarding the HP slate:
"Text on the screen was comparable to the iPad, but the screen wasn't as bright under max brightness settings. The TouchPad, at about a half-inch, is noticeably thicker than the iPad 2. And at 1.6 pounds, it's also a couple of ounces heavier. HP's tablet has only the one front-facing camera; the iPad 2 and other rivals have front- and rear-facing cameras."
The weight alone is a killer. The iPad 2 is so dang light! And no rear facing camera? That sucks because having on is very nice when you do FaceTime and want to show something or someone
"Each visible card represents an active application — tap the card and it takes over the full screen. Related cards — multiple browser pages, say —- can be stacked on top of one another. And when you're done with an app you can dismiss it by flicking it off the top of the screen."
Sounds neat, but by being active apps, doesn't that eat up battery life? Correct me if I'm wrong, but I think iOS puts an app in like a suspension when you switch so that it's not constantly running in background eating up your battery time. Google Android apps face this same problem...always running and you can get a 3rd party app killer to stop that I think...or maybe that's freeing up resources or memory...something.
And as far as flash goes, he even said that it had occasional sluggishness due to flash. I don't miss flash at all!