Yeah the lights were off by default all the way up to the GM, and they changed it for the retail release.

There already is a touch-enabled iMac. You just have to buy a magic trackpad. This is where apple is going with their PC machines. I can realistically see them one day releasing an optimus tactus style keyboard / trackpad.

"Your dining companions' location belongs to them."

isn't there loads of helium sat at the top of the atmosphere? Or is that not how it works?

tl;dr

You do realise it's the loading circle right? That's the joke. Wait for the loading circle to appear and then press ANY ARROW KEY, and you'll start playing snake.

I'm sorry but, I've got to agree with the song shown at the start of the conference. Mainly: "If you don't want an iPhone 4: don't buy one; if you buy one and you don't like it, bring it back."