Does your PC need a power-up? Perhaps a little boost in speed, power, and size? Or maybe it just needs more magic, or a certain sword. Or maybe your iPhone will charge better if you plug it into a pipe! You never know, it might just come back full of coins. Or you could give your phone to a Creeper, if you're into that sort of thing.
Perhaps these custom PC cases and phone docks from 8-Bit Builder will do the trick. They're not cheap, but they are awesome. And the builder himself, Richard Clinton, takes custom orders. So if your computer keeps dropping dead and could really use an extra life, he's the man to see about getting that mushroom case in the green version instead.
Sadly, there's no fire flower version, so your PC can't spit fireballs at your foes. Actually, that's probably for the best.