To be honest, it's not bad at all when you have 2 screens, and use OblyTile. In fact, I prefer it over Windows 7.
Windows 7 was actually awful when it came to multiple screens.
Windows 8 is also much more optimized, and less resources are spent on graphics, because they've been simplified. Then there's the task manager. Love it.
As long as you don't use any Metro-style applications with a mouse and keyboard, anybody who loves Windows 7 should love Windows 8 even more.