The single required usecase of Leti is that I can compute outside. This would've been more convenient if 2560 x 2560px, 70-90PPD AR headsets existed, but they don't and #T^2 TyMist [gd0138] didn't work out since I don't have the optical manufacturing capability, nor the FPGA skill to take a DisplayPort 1.4 signal and mirror it so that it was the correct orientation when reflected on a curved combiner.

That means I have to battle the sun, which seems to be a simple case of emitting about 1000 nits:

Precisely 0 off-the-shelf OLEDs or LCDs I can use can reach this, though that 6.3" local dimming idea I had could be as bright as 1500 nits.

Ergonomically, there are 2 issues. The first is that it feels like I'd want to keep the entire length of Leti at around 300mm / 12", going off of holding a 290mm box in a similar way. The second is that having neither of the screens centered just feels disorienting to me. 

The solution to both of these problems is to have a single 6.3" screen, just that one is on the top and another on the bottom:

The top screen would likely be the main one, and the bottom screen for additional workspace.

Another benefit is that I would be able to still use the UMPC like #Tetent [gd0090] when the screens are folded down, as the top screen shouldn't cover the Tetrinsics (or just barely).

I'll have to worry about brightness uniformity and power consumption though.