I'm looking very closely as to in which areas Zen will come close or beat Haswell per core. If it's close enough then I'm early adopter as I do a lot of stuff on my PC which can use 8c+, but gaming is also important as it's my way of relaxing.
So far things are looking good to me and even though in games I probably will not see any difference, I'm willing to spend money on Ryzen to have some fun playing with new toy like in the old days.

One more important aspect to me is power consumption and that was the reason I never bought Bulldozer. With new AMD 8 cores it looks like it will have all the bells and whistles to save power when performance is not needed