The UHD 770 is in fact current-gen integrated graphics. It has the same modern features like DP 1.4a, HDMI 2.1, etc., which allow higher resolutions/refresh rates compared to older products like UHD 630. The main difference is fewer execution units compared to the Iris Xe-branded graphics.
Also, so far they've only put Iris Xe on 4-core/8-thread laptop CPUs; all their high-core-count laptop CPUs have the same reduced-execution-unit pattern as the desktop ones. To me, there seems to be some tradeoff between integrated graphics and CPU performance.
https://en.wikipedia.org/wiki/Intel_Graphics_Technology#Twel...
Also, so far they've only put Iris Xe on 4-core/8-thread laptop CPUs; all their high-core-count laptop CPUs have the same reduced-execution-unit pattern as the desktop ones. To me, there seems to be some tradeoff between integrated graphics and CPU performance.