Apparently the NHL is experimenting with a new goal post and crossbar design:
…the league’s hockey operations department began testing a new type of net that could promote more offence.
The prototype is still six feet wide and four feet high, but instead of circular posts, the net tested has oval-shaped posts with the flatter, longer side positioned on the inside of the goal. The belief is when pucks hit these posts or crossbar, they have a better chance ricocheting in for a goal, instead of bounding out.
No word yet if they are trying to fit cameras or sensors into the posts. That would make too much sense.