Not too long ago SF IV was free during a weekend. I remember because I tried it... and boy, I sucked at it! I played a lot of SF 2 on the SNES, and the game has changed a bit.
Also, today's controllers aren't as well suited for fighting games as the SNES and the 6 buttons MegaDrive/Genesis controller.
Btw, Ars Technica has compared SteamOS vs Windows 10 with a couple of games: http://arstechnica.com/gaming/2015/11/ars-benchmarks-show-significant-performance-hit-for-steamos-gaming/
Not even Valve's own games perform better in SteamOS.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.