Get an iPad?
Especially if you don't already have an iOS device. For someone with an iPod Touch or an iPhone, there's less reason to get an iPad (though reason enough), but for someone without one, well, you're missing out on a great platform and a great device. The App Store is huge, and a fantastic place to find new software/games/etc., often for free. The perfect place to support indie game development.
Oh, and Plants vs. Zombies (the best version).