For those of you interested in the results, or holding back on upgrading because you're not sure if it'll be different, I have a to-do article on my list to compare game performance between Windows 7, 8.1, and 10. I may also have time to do Vista if I download the service packs in the background.
Would that be of value to anyone in this thread? I'll be running the comparisons on a Core i7-4790 with a GTX 970 and Radeon R9 290. I have another article idea to compare gaming performance in Windows 10 against Ubuntu 15.4. Thoughts?