Seriously..even I dont see the need for anything beyond 1080p on a phone. Heck..I'd say even 720p is adequate for a sub 5" display.
But..coming back to the Nexus..I wonder why the battery life is so low compared to the Note 4..is the AMOLED screen that much more power efficient or is there anything else to it? GPU performance from the Adreno 420 is quite good and the Snapdragon 810 with Adreno 430 should take it even further.
What's so great about the 420 performance when it seems to throttle quite heavily? I'm willing to bet that if they'd clock the 420 at lower levels to minimize throttling the difference in performance compared to its 330 predecessor should be miniscule.
Initially while watching the 420's/S805 SoCs I thought it's just a singled out incidence, but there are more than one examples: http://gfxbench.com/device.jsp?benchmark=gfx30&os=Android&api=gl&D=Samsung SM-G906 Galaxy S5 Prime
Unless the entries at Kishonti are wrong that's a performance degradation of roughly 48% in T-Rex for only 30 runs through it.