> Does the page look and feel glued to your finger as you scroll?
Yes, for me issues with apps have mainly been in poorly optimized code causing lag, slow loading and the like. The 60hz/120hz thing has never really been a practical issue.
Not sure about iPads, but going from a pixel 3 to a pixel 5 made me feel like my pixel 3 was broken. Xr to 16 pro was similar, but that is because Xr was legit broken.
The ProMotion screens have variable refresh rate depending on the content displayed. 10Hz to 120Hz for iPhones and 24Hz to 120Hz for iPads. So in theory the power consumption should be even better than a regular screen for static content like reading text.