This idea has the 4 displays in a cuboid and 4 right angled prisms do the beam redirecting and merging all at once. To get the bad news out of the way, this cuboid is likely going to be larger than 100x100x60mm and I cant yet think of a solution that looks ok.

The benefits are:

• Uses the least amount of prisms so far. As well as price, this is important for fine tuning as I imagine it takes a bit of fine tuning to get a single prism to line up correctly in all 6 degrees of freedom.
• The cuboid could be detachable when not in use. 

I might as well try some ideas...

hmmm I feel like I'm going to hit doorways with that. And there goes my other idea of having it at the end of an antenna or something.

I mean... I like the top form:

But the front... Maybe if you were going for a more military style it would work

Or maybe double down and add a light?

Yeah like... it looks like it's equipment you'd wear at a job, but it's a lot more like a helmet and less like a hat, like the previous concept:

I guess I could merge the two ideas

Nah, the previous one was better.

Could I Dynamic Island my way out of this?

Uhhhh maybe? Filleted chamfers?

Probably not.

Also no.

I'll probably just go with this. For now, at these early stages of the project, I just need a solution that works and has a non-eyesore looking design.

It still looks like a futuristic tank turret though.

This might help...

Yeah like it looks more like a house cut into a hill with green windows. Combining the two ideas is also an option:

Yeah...? Perhaps...? Maybe...? It's... possible. Maybe fillets are what I need?

Nah the fillets mean that there are too many curves and not enough sharp edges. 

There's also this idea:

Yeah probably not.

This one looks the most like #Tetent Timespy [gd0136] and #Teti, so I'll go with this.