I always shoot 4k to help me in post production:
Is 4K *REALLY* all that important ?
My impression was that it was mostly hype. I suppose as time goes on it will be mainstream but how far away is that?
If you could only chose ONE feature above any other thing, what would it be?
Helps me frame the shots better,
Use software stabilization,
Publish high quality FHD
One of the most important features IMHO is Daynamic Range.