Ironically, my output on my tv is set to 720p because it fits movies and things better.
but on my laptop with 17" monitor, it's set to 1080p
I don't mind editing pictures on my laptop at all (not that I have a powerful one) My old I5 with 8 gigs made me want to stab myself in the eye (exaggeration) I assume part of that was down to it likely being a 5200RPM drive, but still. But the monitor on it was still excellent for photo editing, when the pictures finally loaded
I dislike laptops because there is so much extra software being run that you don't see, just to maintain the 2 power sources. I find a lot of the ram is used up by this and makes the rest of the computer crawl as a result. And they are 2x the price for the same gear.
It's your money, but the rest of the world runs just fine on normal monitors. And much of the world is running on monitors that are 5 years old, or even older.