We all know MS will use E3 to peddle their shit, like Xbox 4, Game Pass, xCloud, and their studio acquisitions, and whole industry will be there to write about it cause it's still the most traditional way to do things. Then they'll do their Inside Xbox on monthly'ish basis and This Week On Xbox to continue the feed to fans.
What will Sony do, when they've ditched all conferences, fan events and have opted for State of Play and their continued old school blog? Even very recently Sony skipped E3 for hardware announcements to do a live event, like they did in Sept 2016 to announce the Pro and Slim, do you think they will do something like that, or do you think they'll just use these State of Play pre-recorded to announce hardware?
Even Nintendo who mostly does Directs announced the Switch via a live conference with pre-recordered stuff inserted throughout.