Any reason this wouldn’t be possible??
The difference between ATV2 and ATV3 is not only the ability to output 1080p, but there is also a better, faster processor, making the software run more smoothly (and i would presume video content processing as well).
Personally, I already own an ATV2 and I’m considering selling it and getting the ATV3 for these two hardware upgrades (don’t really care as much about iOS5 as it’s available on both).
Why not just run 4.4.4 on ATV3?? 1080p and the upgraded processor hardware upgrades, so the software it’s running shouldn’t matter.
I’m surprised no one has mentioned this yet.