This is one of the most unintelligent statements ever posted. Seriously. Why do you think even mid-level Droid phones have 7 homescreens? Nexus 7 can run can run as many simultaneous apps as you can stand to keep track of.My phone can run 12+ at once, and the Nexus is more capable...
With Go! Launcher, I can have as many homescreens as I want. 20? 40? 90? I don't even know there is a limit. And I don't care. Because it's utterly irrelevant.
I can't run more than one thing in the foreground at once. Background? Sure. Foreground? Not so much. Show me Firefox and World of Goo each running taking up half the screen. Show me those two each taking up a quarter of the screen with Facebook taking up the other half. Show me all three of them taking up a quarter of the screen each while tuning a piano with AutoTuner on 1/8 of a screen and running a level app on the other 1/8 screen. That's what the Playbook brings to the table that Android simply cannot do - Android can run plenty of things in the background. And I love that. But...
Simultaneous as in "on the screen, running side by side, at the same time" is a completely different ball game.
Don't get me wrong, I love Android, and I run Linux (the kernel upon which Android is based) at home. I jumped for joy when our Blackberries were taken away and I could finally have an Android.
But the PlayBook does have some distinct features not available on any other current tablet. Multiple Android KERNELS running simultaneously with separate memory instances and subwindowing of them is huge. Perhaps not very useful for most of us, admittedly, but it's leaps and bounds above what Android can do from a kernel management / preemptive multitasking point of view.
You can have my Nexus when you pry it from my cold, dead hands. But the geek in me, the same one who loved OS/2 over Windows 95, loves the audacity of virtual machining on a tablet platform. That takes some serious chutzpah.