I'm not sure yet ... I probably will just for the new features it has. But I'm still trying to get used to the whole start menu. And I have yet to figure out how to change my default browser. Like I use Chrome instead of IE9 and the built in IE - which is the one that always pops up when i click on a link. Just gotta do some looking around.
I personally not sure how I feel about Windows 10 now, as someone I was working with at Work Experience had the Technical Preview on his laptop, and it didn't look like the interface was as good as I was orginally hoping.