> 'same laptop, but slightly cheaper because there's no battery in it at all'

So, a simple computer? You can even choose your keyboard, mouse and screens.

Not the same - I still want to be able to just use and carry round the one thing without needing a monitor, mouse, keyboard etc at every single location, but I basically never need to use it somewhere where there isn't a wall socket available.

It seems ridiculous on the surface, since you'd think you'd just buy a desktop or something, but with a laptop with no battery, and hypothetically better everything else, it would eliminate the need for a bunch of other peripherals