I've made the switch to the 2560x1440 monitors (27") about the same time as you and totally agreed about your observation. For TV and video I think Full HD at 1080p is the cut-off but for text reading and editing 2560x1440 is really a game changer. Everytime you go back to 1080p even for smaller 13" screen it's a very annoyingly noticeable with the jagged lines around the texts and is a bummer.