The possibility of them using a PowerVR GPU was the first "fly in the ointment" that occurred to me upon reading this. I have the OG Beaglebone and the closed source GPU driver was a real pain to deal with in terms of updating the kernel and the like. Do you have further details on how far along their open source effort is and how serious they are about it? The last reference I found in a quick search goes back to Aug 2022.

https://www.phoronix.com/news/PowerVR-DRM-Kernel-Driver-RFC