Elf Sternberg

But the cost of the Xbox is the lion's share of that cost, and you can't play Assassins Creed, Space Invaders Extreme, or Quad Power Racing on a guitar.

If you want guitar tabs, you have to pay for them just like you have to pay for games, so I wouldn't exactly go so far as to say that a guitar opens possibilities while Xbox closes them. You could say you can compose your own music with a guitar, but you could also say you can compose your own games for the Xbox. Composing music may be somewhat less difficult though.