Weak analogy. Apple has had multiple monitor support for years. There's absolutely no excuse for them not having full support for multiple monitors from day one of adding full screen mode. It's not an issue of technical innovation, it's something they were certainly capable of doing at the time but just didn't get it in. And a couple years later, it still isn't in.
And this is one of the prime reasons I am
still using 10.6. I use applications that use multiple monitors and Spaces was one of the best ways to use it. These applications permitted me to display imaging on one screen critical to my work and ancillary data on the other, yet allowed me to easily switch desktops on both screens when necessary to do other work.
I also run very compute intensive tasks in background (monte-carlo simulations) at low priority. I realize this isn't the typical Mac use these days, but it is why physicists love macs. I really would love to bring the 10.6 to an updated version, but after having a go with 10.7 and wasting hours, I'd rather go back to FreeBSD/KDE than deal with 10.7.
Colors on things like finder folders (applications hieroglyph) help make it quicker to find things. Apple probably found it cheaper not to colorize so they didn't.
Computers are about productivity. These things make us more productive. Without them, well, there's always FreeBSD/KDE or Linux/Gnome and at far lower prices.