Windows 10 upcoming build will feature several gaming related optimization. Reportedly “gamemode.dll” has been discovered by WalkingCat in Windows 10’s leaked build 14997. Which may part of new “Game Mode” that prioritize resources when “Game” is running.
.@h0x0d looks like Windows will adjust its resource allocation logic (for CPU/Gfx etc.) to prioritize the "Game" when running in "Game Mode"
— WalkingCat (@h0x0d) December 28, 2016
Though it’s unclear if the Game Mode will benefit only games built on the UWP based Microsoft’s Windows 10 Store games, or even the Win32 based games that widely available on Steam, Origin, and UPlay.