It seems pointless and liable to break to me, just use a desktop or if you really need two screens on the move, use a tablet as the second screen. Having said all of this, I'm not a fan of two monitors in the first place and don't have two.

Hard to implement cleanly, since you'd probably have to double the thickness of the display part. Maybe with the new fancy paper-thin/foldable displays it's possible, but it doesn't make sense ergonomically since it'll be off-center.

>>2038
>it'll be off-center
I've seen home made mods that have the screen fold out on top. Which places one of the screens at eye level, making for a more comfortable view.

>>2039
That'd be neat! And the vertical real-estate would be very useful. Tangentially I don't know why almost all laptops are 16:9, even though 16:10 gives you that extra bit of valuable vertical space.

There's a neat youtube video of someone making a pretty stylish portable 3-screen setup (yt: "Triple-Screen Laptop done right", by "DIY perks"). It's not quite a laptop since there's no inbuilt keyboard, but I think if for some reason you ever wanted a portable 3-monitor computer setup, that's the way you'd go.