I think the company overall is transforming somehow. The image of the camera on the treadmill and looking in the mirror isn't about just cameras. That image has been used to represent Avigilon in a lot of their marketing material, so here it's been used in that sense. They are not just announcing a new camera, they are chaning the whole company.
The 4 is going to refer to the other acquisition they made after VideoIQ, with the other part of the money they raised. So far Avigilon has:
CCTV (The core Avigilon product)
Access Control (Redcloud)
Analytics (VideoIQ).
Now they'll add the 4th missing component to making a full security end-to-end play. Probably routers, switches, power supplies, something like that. I've heard things about MOOG being up for acquisition, maybe Avigilon bought MOOG? That would give them a lot of missing odds n' ends in their product lineup.