(source from official twitter account of JR East)
The Upcoming E10 Sinkansen announced by JR East. Hmm, based on the information provided (source), it has a tiling system installed, and some fancy seat. It was said that it would be operated at 2030.
Green car seat
Regular seat
TRAIN DESK.... named by JR East. I don't know what is it for
(can it really reduce sound?)
The Green car seat oddly look similar to those used by Cathay Pacific
and above image is capture from video, which you may want to see at ANN news: https://inv.nadeko.net/watch?v=HKp2djG04YU
And the maximum speed (under operation) is still set at 320 km/h.......I expect the speed to be higher
The „Train Desk“ car is probably intended for buisiness travellers to be able to work while travelling.