Seems good, while quad core can use more power, modern CPU's to turn off idle cores completely.
Quad core may also help or web browsers, especially if the browser is multithreaded (in which case they need to be yelled at for not making desktop web browsers multithreaded)
[citation][nom]dalethepcman[/nom]Android 3.0 and higher all support multiple CPU's at the OS level, building multi threaded apps would be up to the developer. At least the OS can actually multitask unlike some other fruit based OS's that think playing your music or talking or texting while doing any other 1 thing is the definition of multi tasking.[/citation]
While those products can multitask, the issue is they make it hard to deal with multiple apps (just wasn't implemented well in the OS)
Android does a little better job but doesn't deal with multiple apps too well (it may randomly close some)
Webos seems to handle multitasking the best where it wont randomly close programs and makes it easy to navigate them.
Though from some previews, it seems that windows 8 for the tablet will have some decent multitasking abilities