One thing that also needs to be acknowledged about WebOS is/was the notifications system. You see influences of it in the new iOS and with ICS as well. Being able to swipe away a notification at a time is pretty big for me.
But be honest, your 'multitasking' was nothing more than a different visualization of 'recent places/apps.' Because you can have all the cards in the world that you want up and off to the side of the screen, but you focus back on them and they had to refresh/reload anyway. True multitasking would require you to split the screen with more than one card, and that is tablet/desktop type work, not even a normal techie need for a smartphone.
And let's also re-examine this idea about the 'lag' on the Evo3D. The true cause isn't Android, as much as the Sense UI. It's a HUGE file and has such a wide breadth of enhancements, most of which are not used much (Friend Stream, People app, Car Panel, etc) that it slows down the responsiveness. Take the HTC hardware and put a pure 'Nexus' ICS on it and there would be zero lag. But then you lose the animations (which are second to no other manufacturer in graphics) and don't forget the amazing lock screen!
All that being said, we are high jacking the thread now.
Another question besides when will we get ICS to be pondered: will we get all the enhancements featured in the Galaxy Nexus, such as zero shutter lag? I would assume lock screen stuff will still be controlled by Sense, but will that also mean that it'll be HTC's camera UI??? Any thoughts on what will be covered up by HTC's modifications?