The benefit of the 90hz is that it raises the bar for refresh rate/2 gameplay for latency/performamce requirement.
40hz alone is half of the input latency difference between 30 and 60 fps, and is much more realistic to hit performance numbers for. Some people run it at 40hz for optimized battery/performamce/latency ratio. Setting it to 45 now makes it every frame is evenly doubled. That along with the die shrink/10W/Hr/chemistry changes will allow the battery to last a lot longer on the go, at least on paper
The benefit of the 90hz is that it raises the bar for refresh rate/2 gameplay for latency/performamce requirement.
40hz alone is half of the input latency difference between 30 and 60 fps, and is much more realistic to hit performance numbers for. Some people run it at 40hz for optimized battery/performamce/latency ratio. Setting it to 45 now makes it every frame is evenly doubled. That along with the die shrink/10W/Hr/chemistry changes will allow the battery to last a lot longer on the go, at least on paper