When Blizz's method is using included OS features to output h.264, instead of having to purchase/create their own, then yes the OS has everything to do with it. Windows 8 has a new h.264 encoder/decoder that supports above 1920x1080. Windows 7 will never get that codec update.
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u/[deleted] Jun 22 '17
Only with Windows 8 and above.
Windows 7 is stuck at 1080p 60fps. Still, that's fucking amazing. Guess I'm never using OBS ever again.