Here are the things I remember off the top of my head

- Faster boot
- Faster wakeup from sleep
- Better memory management
- Less likely to blue screen (ie, better driver management)
- Better touch support (assuming you have the hardware to support it)
- According to some anti-virus research, even without anti-virus, it's more secure than Win7 with anti-virus

Less important to most of us:
- Better enterprise management


>Although I am not using Win 8 on a daily basis anymore than I have to (tech support call or whatever), at least with the $5 start button I can at least use it (and get the benefit of stabliity and underlying improvements if in fact there is really any) without being forced to use something that I find completly silly looking and foolish on a desktop or laptop. I am probably going to pay the $5 to buy this start button for the few clients I have that were forced to use Windows 8 (because of a new purchase of hardware). I feel confident they will appreciate this as they really are annoyed at Windows 8.