whatever they are totally different, and as far as flash goes wait till Robson and Snowgrass comes out, I believe mid-'07 then we will start seeing some neat stuff with Vista.
If Microsoft projects an '07 ship, I'll start looking in '09. Remember Windows 92? Of course not. Because by the time it shipped it was Windows 95.
And Leopard (which will be out by then) is supposed to take advantage of flash too. There's also the rumor that Leopard will continually save your current working state to flash in case of a power outage, so you're instantly right where you left off when you turn the computer on again. Couple that with the "Time Machine" and you'll probably never lose any work you ever did unless your hard drive blows up (and you didn't do anything to mitigate that possibility).