I'm backing Cosmo because this is the closest to Psion PDA I ever found so far, I missed it so much. And it enable me to put up my wishlist :

WISHLIST

1/ Capable to be a desktop replacement : ability to plug mouse + keyboard + external monitor. Example: https://liliputing.com/2016/06/meizu-pro-5-first-ubuntu-phone-thats-also-desktop-pc-thanks-ota-11-update.html  (thanks David Wilson)

2/ Bigger screen : bezel to bezel (thanks stephen)

3/ Fix the loose hinge problems in Gemini PDA - and make sure it's not sharp (thanks Chris Caley, Amanda Lam, Dickon Hood)

4/ Fix Spacebar problems in Gemini PDA : details : https://www.engadget.com/2018/04/10/gemini-pda-review-we-ve-come-a-long-way-since-keyboards/

5/ Better screen protector by default. The keyboard has made prints on Gemini’s one. (thanks Matti)

6/ Screen able to rotate 180 degree : an example : Lenovo Yoga. A sample of valid use-case : enabling Cosmo to be used as hands-free navigation & mounted in car. (thanks River W)

7/ USB-C charging : future proofing + less adapters (thanks elders.richard)

8/ Bluetooth controls that work from a headset when the device is closed (this is still an issue on the Gemini and very annoying) (thanks Steve Jackson)

9/ Make the voice assistant button harder to press accidentally when pocketing the device. Sink it in a bit. (thanks Matti)

10/ Improved microphones, people have hard time hearing me in noisy environments. (thanks Matti)

11/ Flashlight : I have used the one in my phones as emergency torch many many times, very convenient & useful.

12/ Trackpad / Thumbpad (thanks Andrea Pascucci)

13/ ExFAT support for SDXC cards (thanks Amanda Lam)

14/ Dual / Triple lenses (thanks Tomáš Hnyk)

15/ Put light sensor away from our fingers (thanks Stoyan Genov)

16/ More reliable Bluetooth : goes off after restart and after connecting to my car HU  (thanks Stoyan Genov)

Thanks, 
Harry Sufehmi