I tried to simulate 1440p on my 1080p. It's not so much smaller so the native size will not be an issue. I would buy new graphics card, but what to buy when there is nothing new on stock?
So It looks that I will keep it.
144Hz could be better for my eyes. And whole display could be more future proof. Maybe 1080p gaming will be a little blurry, but for my 1 hour a day I can live with that.