[poisonborz]

The market already answered for the time being: none of them. This is space is an R&D sinkhole, all what companies do is make land grabs for an imagined future.

[no_wizard]

It would be a great thing if some unknown company cracks all of this before any of the big ones do.

Seemingly feels unlikely, due to the cost perhaps, but it would upend things a bit, put these bigger companies on their toes.