If using two monitors at once is good, it follows naturally that using six monitors at once is downright awesome. And now you can, in theory, by using AMD's Eyefinity graphics card, which is able to power six 30-inch monitors at once.
What's cool about this is that instead of splitting the monitors up like you see with most multiple monitor setups, it actually treats the six screens as one big screen. So your gaming sessions will be six times as epic, or, if you're less fun than that, your spreadsheets will be effing enormous. Either way, that's impressive.