Adding 2 possible features (4k resolution and memory slot) from an email I got from a heavy user:
Any ideas when we can see a new pro camera. We work with clients who are going for 4K resolution and we would like to support there needs as well. Also as I build interactive mobile VR Apps for Cardboard and GearVR only the picture quality is good enough as in VR everything is magnified as you know.
I defiantly would prefer an optional or just memory slot like the Gear 360 has. Ideally also recording 4K videos to the available length of the SD Card. You know I am heavy user