No, you don't get what I meant.
If the front of the device is empty/no-screen and just has hooks to place a OtherHalf in for the screen... that means the circuit board, display drivers, everything has to be in the OtherHalfScreen and it has to be specially tailored for the connection.

If you pry open a laptop from Samsung, Toshiba, Dell, HP, ASUS, Lenovo etc etc... you'll see they all have different internal connectors, but it runs off the same process. There's very little difference in their screens.

There's a very good reason for this, and its mass production. The factories churn out millions of generic screens. They're shipped to OEM warehouses where they go some generic alterations and put together into units.

I'm not saying its impossible. I'm just saying the whole OHS process will add a lot more delays into units. And thus it will add cost and availability issues. Also negative effects like a thicker device, possibly longer screen latency, more fragile device.

What's the gain?
The possibility to change the screen in the future. Not quite important I believe. By the time the screen is burnt out, it will be many years. And by the time you get newer screens, technology would've improved in other areas like the cpu, gpu, ram, flash storage, radios, speakers, etc etc. You might as well just build a new phone from scratch.

I mean imagine having a new updated Jolla phone every 18 months. Wouldn't that be better?