I am just curious whether the latest beta's have shown drastic improvements over Windows 8.1 (fully updated) ? I could care less for Start Menu/Button or whatever because IMHO it is absurd to base your opinion of an OS on a small UI tweak/change. I'm a gamer. I want performance, stability, smoothness, and more performance. Will I see any improvement in those areas if I switch to Windows 10 when it comes out, ASIDE from DirectX 12 drastic improvements, which AFAIK will affect only DirectX 12 titles.