I'm moderately surprised that the "but with peripherals it will cost ONE MIIIILLION DOLLARS" argument is raising its head again here. I really thought we'd addressed it already.
One of the things we worked very hard to do with the original design was making sure that all peripherals would either be hanging around in the home already (hence the change to MicroUSB, which is the EU and US standard for phone chargers now, so they're available in increasing numbers and at decreasing price as time goes on), or available at the lowest possible cost. That's why there's a composite port there - if you're not from a family wealthy enough to have upgraded their TV or to own a monitor, you can still use the Raspberry Pi. Most kids can scrounge up a second-hand USB mouse and keyboard from a parent, a parent's friend or the charity shop for little or nothing; and they're extremely cheap online too. And if you don't own one already, that SD card will set you back less than a fiver.
The peripherals at ONE MIIIILLION DOLLARS argument is still a very popular straw man, though, and it's beyond me why people still use it. Seriously - if there's anything to criticise here, you've got plenty of more valid options: the amount of RAM, the fact that we don't bring out VGA and so on. Use those in your arguments instead. You'll get much more useful responses.
Director of Communications, Raspberry Pi