You're out of your gourd. I don't know what connections are like for you, but I have DSL, and in real-world downloading of a massive file, I get a MAX of 150k/sec, and that's not great when you start talking about 6GB files. It would literally take me 1/10th the time to drive to my Apple store and buy iLife. Cable internet here is better for people that can get it, but you rarely get what's advertised as the top speeds, especially if you live in a neighborhood where almost everyone is plugged in; speeds can slow to 56k-like connections at peak hours in some areas. Fibre internet is coming but very very slowly, it'll be years before it's available at my house.
I've actually heard the opposite of what you said, that Europeans are way ahead of us in getting super-fast residential broadband. Regardless, you're right about downloading 6 GB software and 4 GB movies being the way of the future - key word being "future". The point at which I don't need an optical drive in my laptop is still years off, and that means it's still at least one laptop away. That 12" MacBook, if it exists, better have one, or I ain't buying it. (I'm fairly sure it'll have one, though, Apple's not stupid enough to think we can ditch optical drives just yet)