On the first-party's respective console
On a live stream
On TV ('Murrikans)
Catch the highlights
I may actually entirely forgo any streams for anything other than third parties this year, because it was all fine on the 360 last year, and now I have a PS4 for Sony too. Although Sony always does its presser at like 4AM BST. Who knows, maybe EActiUbi will stream their stuff on XBL and PSN too. Nobody cares about Nintendo.