A lot of current laptop designs are leaving free space around the battery so more AI can be poured in at a later date, through a dedicated nipple presumably.
I wouldn't say no gain. I would love that real estate on my bedside stand I use with physical disability. I would not want the sub 17" form factor and keyboard though. I struggle to do anything super technical without a second screen which is a pain in the ass. I can't sit at a desktop and the ergonomics of a laptop are unbeatable in my situation.
Two or more windows on top of each other. Have you never even put a monitor on its side to get more vertical space?
As a Dev that needs some communication with a team, documentation and potentially a video for entertainment whilst working. Monitors that are taller are great. The LG dual up is my holy grail right now.