https://twitter.com/LaurakBuzz/status/789131903622406144
Anybody bring this up? This person seems to have solid sources.
It's technically possible for the system to upclock when on charge power. Most modern OSes can do this on laptops when they're plugged and unplugged.
ie, pushing more than 720p on the screen itself would be a waste, but you can use extra clock while docked to go to 1080p without having to worry about battery drain.