Variable refresh rate (VRR / G-Sync / FreeSync / Adaptive Sync) and high-refresh rate hardware is now starting to gain traction on the high-end, usually with both technologies combined. Apple's ProMotion is often touted as a "120Hz" feature, but it's also a variable refresh in that it can support much lower framerates. Without a static v-sync interval, you can display the frames as they become available, for both perfect tear-free visuals and lower latency. It's quite likely we'll have that on Mac's as well.
I recently got a 144Hz FreeSync (G-Sync compatible) "business" monitor, so this tech is starting to filter down from the gamer side. It works great with a compositor on Linux! Ultra smooth mouse and input response at 144Hz, and completely tear-free. I would highly recommend it for developers as well.