I will say one thing that is nice about having "real" multitasking in Android is when opening the Twitter app, I don't have to wait for it to refresh as it has already been refreshing in the background.
Of course the downside is that my Nook Color's battery was dead after I left it in standby for a day. So there are still some battery life tradeoffs between the multitasking methods.
I still prefer iOS's more hands-off approach to multitasking mainly because I don't have to do anything and "it just works." It could be a little faster when switching apps though, there is a momentary pause when you switch between an app and when it becomes functional. On Android when you switch to an already running app it is pretty much ready to go.
I wonder if Bestbuy has a Xoom display set up. I might have to go check it out. I won't be buying one though, the $800 price tag is way too much for me.