As I am enthusiastic about Planet Computers work. I am also skeptical about Cosmo communicator.
I think it is too soon for next-gen device. And apparently cannot Cosmo address some some design flaws which will be discovered by long-term using of Gemini.
Sure, external display is very nice touch (solves problem with incoming SMS and phone call). But it also means Android had to be heavily modified for this device => Much less probability of upgrading OS to newer version, because it is lot of work of poeple (and they cannot work for free). Also you can't use something community-made (like LineageOS) for same reason.
Fingerprint reader also great. Makes using secured device less irritating.
Camera and backlight keyboard are sure nice touches, but not so much of killer features (at least for me).
If I count it up, I think they should wait. Gemini is good enough to replace my cellphone (fully) and my laptop (in ~95%). But time is revealing some design flaws.
For example - less than month ago I had to send my Gemini to service. I used it as daily driver and one of hinges below screen did not make it and started cracking. When problem came up, I noticed that hinges are just small metal sticks pressed into plastic frame around keyboard. Well, that solution can't bear long term using and many openings everyday for sure.
Would be nice if new device address those issues first, and then adding some more features. Of course there could be much more design flaws which will be revealed by long-term using. But Cosmo looks more like exactly same as Gemini.
I would like something more different. Opening design like TyTN II (
https://en.wikipedia.org/wiki/HTC_TyTN_II) would solve some of problems (BTW, I have this device still working, which proves it's opening mechanism is well designed...) and it does not need secondary display...
BTW, that Cosmo top plate design is... Really weird.