2020 has been an exciting time for emulation systems and it looks like we'll be headed into 2021 with some momentum to with a few systems still yet to be out before the end of the year. Here's what's likely available soon:
ESP32 Mini Game Box
RG351M (Rumored Dec/January)
GPD Win 3 (Pre-Orders start in January).
I'd love to test them all but if I was choosing interest just for myself personally I'm keeping an eye on the Digidock 2 mainly for the DIY factor where you can set it up with your choice of hardware and software. Is it worth the cost? I don't have the answer for that yet.
The Gameforce RK3326 interests me mainly on aesthetics at this point.
The RG351M will be a day 1 purchase for me as soon as Abernic makes it available.