Well, the impact its not already in browsing for example, chromium will be on soft render for now, thats told me alyssa. And every its on early stages, but on paper the gpu its more powerful than the rpi4 one, so we could expect great thing about it. This is my image, but ive recommend you to try to compile it , becase there are kernel improvements than they add there. Ive tried panfrost on manjaro too, but its not has good as armbian. Overall, you could expect long time to boot, even on armbian, but manjaro takes 3 minutes…so, i could not allow that.
What you need to run panfrost its a kernel 5.2 or newer, and with panfrost include as module. Then compile mesa with panfrost. Ive gave you the image already done with the kernel thing, then you need to install the driver, for what nicod and I crwated a easy tutorial than you can find justsearching on google on armbian forum.