it's all on git: https://github.com/RetroPie/RetroPie-Setup/ follow the commit messages and PRs and you can see what's being developed. beyond that, there's discussions going on behind the scenes, but there's no formal roadmap. remember this isn't a job :)

@petrockblog Thanks for your response! When you succeed, I'll keep the system I have now and buy the ControlBlock for my new Pi 4. Anyway, sounds good and promising, Good luck! BR.

Great news, will do ASAP!

@quicksilver I'll be getting the 2GB version. I just don't see the point in getting the 4GB version unless you're going to run desktop type workloads or know, specifically, that your workload is memory intensive. I have a hard time seeing how the emulators that you can run on this board will benefit from going with the 4GB model. But I could be wrong, of course. :D Oh, and I just found this: "The VideoCore 6 is about 4 times faster than the Video Core 4." It's on page 22 in the PDF linked here: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=243372#p1483956 Sounds very promising, but we'll see when more benchmarks start showing up.

I don't see it in any way different than other SBCs based on the RK3399 - there are countless ones released recently (like the Rock/Pine series). The XU4, despite being 'older' I think it has better support as far as RetroPie is concerned (i.e. emulators tested, graphic drivers, GPIO, etc.). Do note that a better CPU and better graphics usually mean also you need a cooler/heatsink in these cases.