S5 may have improved upon s4's display, but I am waiting for a comparison between S5 and Z2's display.
From what i have read Z2 has a better display than M8.
So yeah i am still waiting for that[emoji6]
Sent from my GT-I9300 using Tapatalk
DisplayMates review of the GS5 display says that display is as good as it gets, so what you will hear about the Z2 will likely be similar or less. It's hard to get even 'more' color correct, you simply won't notice the difference. The only thing that might happen is that the Z2 will have a higher brightness (which also means more battery drain, especially on LCD), but I won't count on it, because the GS5 has a very low glare while the Z2 looks very glossy to me.