I am an old time Psion Sienna and Revo user and have missed them since they stopped working/wore out.
I have been through Sony Ericsson p910 (couldn't replace batteries any longer) and Nokia E90 (forget what went wrong with this device) before settling on iPhones.
I am in the process of moving away from my old iPhone 5s.
Ok, the Gemini is larger than my existing phone by quite some margin, that I have to go through a learning curve to transition away from IOS.
I use Linux at home, I may even setup Linux on my Gemini, if I feel motivated enough, the fact that I can and it's supported is awesome.
It's early days at this stage, some things I would add/change from the current hardware version include (given my order was < #60, I guess I have the lesser CPU installed)
1. External camera, it's awkward taking pics using the internal camera
2. External volume/play/skip control buttons
3. Smallish External display to show incoming calls, current music, etc such that I don't have to open the Gemini.
Software, I expect things will firm up as time goes on.
So I thought the best people to help me answer it would be the folks who've already ponied up the bucks and put their orders in for the Gemini. Why did you choose this device instead of a smartphone + accessory combo?