10. Ding-dong, the Sidebar is dead.
9. Calculator, WordPad, and Paint got overhauled.
8. Windows 7 will run longer on your notebook's battery power.
Vista's power management was definitely better than XP's, and Windows 7's is remarkably better still. Part of it is just that whole smarter background management, which for battery life does things like dial down the processor more often, use less juice to play a standard def DVD, automatically turn off your Ethernet adapter, common sense stuff like that. But it doesn't just do all this fancy energy-saving jujitsu behind your back (though it can). Windows 7 is capable of delivering a battery efficiency report that breaks down in detail what's chomping on your battery—power-slurping hardware, vampire-y processes, the works.