@wuppi
I assume, that bigger bags won't fit, so these cabins are not for holiday trips, but they would be good for weekend or business trips. And they provide more privacy than the old sleepers with 2, 3 or 4 beds.
There will be bigger cabins with more room, too, some even with a private bathroom, but these will cost more than these small pods.

Some more details:
youtube.com/watch?v=-NhSiK-kpB

@thibaultmol