Yeah, I'm sure the only addition from iOS would be the option to pause the background task... I mean, I've never had any problem with multitasking on OS X. I either use Spaces or command-tab and there's never been an issue. Of course, it would be nice to be able to set priorities, but I also don't want to be doing this manually all the time. Maybe it could just be a vertical list of running (user) processes, that you drag up/down to assign priorities... and maybe with an optional slider for fine-tuning? That would be simple, quick, and still provide at bit of "power user" benefit. Dunno... But I definitely don't want to be busy thinking about this all the time. I often work between 5+ apps and if I'm concentrating on the work I shouldn't be distracted by traffic control...