It is weird how early Nintendo figure out that streaming was the way to go.
So, the only similar event Is the Game Awards, right?
The game awards and what preceded it were never good though.
That said there is still the Tokyo Games Show (TGS)
https://expo.nikkeibp.co.jp/tgs/2022/jp/
and Cologne Games Show aka Gamescom in Germany.
https://www.gamescom.global/en
The latter held in August, the former in September a few weeks after E3 so usually was a good place to see some gameplay for what might have been announcement and prerendered nonsense. Don't know what will happen with E3 gone for the former and if they will get notable announcements from non European companies.
Whether we will see anything at PAX (penny arcade expo, was presumably a reason they were tapped to try to save this and does have a notable closed spinoff in pax dev as well, and has seen some announcements and interesting things over the years), magfest or south by southwest (
https://www.sxsw.com/conference/game-industry/ , though with it happening weeks ago and nothing much of note coming out then eh, is on Chary's doorstep though so maybe next time), or maybe some of the smaller conferences (or possible comicon taking up some slack) I do not know.
E3 never had a point though. The Oscars are actors circlejerking themselves to themselves. That's the whole point. It's marketed by actors, for actors, and only actors are in attendance.
E3 is by the industry, for the industry, and only the industry (except for like the last... one or something pre-COVID) was in attendance. Who cares about it? It's nothing. Literally nothing.
Working in the industry was a fig leaf before then -- if you worked at gamestop or got an article published as an outside writer on anything vaguely well known you could squeak your way in to at least the later days.
As far as not having a point then I will dispute that one for some years ago as it did benefit having a centralised thing (see Microsoft going to CES to announce the xbox and the eyebrows that raised). That said the time was it Konami went for a premade stream it was pretty much done, some might even go further back and note when Blizzcon got big*, companies also complaining about pointless excess and cost (it is in LA after all) for years before then.
*when that was I don't now but might as well have the classics and while I might not know when it spelled the end of I will go with it for a no later than.
(2010 for the original)
https://knowyourmeme.com/memes/do-you-guys-not-have-phones (2018)