Sure, it's one thing to build a Game Boy emulator
allows for, and to see if it would be possible to fully emulate a Game Boy from the CPU up. Sure, HTML5 has already proven useful for straight games, but an entire architecture? Turns out, it's pretty possible, and Imran has an excellent multi-part tutorial for how he's doing it. Right now there's a nearly playable version of Tetris, and pretty soon we'll all be playing Zelda in our web browsers and that time when we tried to build an HTML table from scratch to show a few of our favorite animated GIFs on our GeoCities page will only be a distant memory...