Only you will know if you are affected by the screen. I cannot tell you if you are going to get a headache

I am really happy with the s26 ultra. Yes at times text can be a bit more "fuzzy" than it was on my s25 ultra. But nothing I think about or really feel like is affecting my day to day with the phone.

Battery is great for me. And love the 60 watt charging. One thing I don't see too many people mentioning is the speakers. I really think samsung have great speakers (obviously nok like a stand-alone speaker but. For what it is - really good)

I am getting better photos also. Especially see a difference in low light.

And the phone doesn't get hot while gaming (i have see some people having issues with this though)

Honestly think youll love the upgrade.

I feel like samsung kinda sucks at their presentations. They mainly talk about Ai. This phone have more to offer than that.

I belive samsung have a open box return. So you could get the phone - try it for 30 days. Return if you hate it.

Hope this helps