Oh man, I used to watch and get excited way before E3 was coming out. We used to talk on here about what to expect and what people were excited about, etc. Clearly, 2 huge things have happened and probably why I don't keep the same level of hype or interest in them currently:
Covid - clearly made everyone rethink how they could do game releases. Now that people rely on social media more than ever, its allowed people to create their own game release shows at far less of a cost to go and show off at the old Expo events.
The demand on current games. We want games far quicker than the usual 6-7 years to develop a AAA game, but unfortunately the only games that take less, are Indie, current games that are live and receive updates/patches, and game sequels/prequels from existing code so aren't true AAA games.
The general average gamer's needs have changed so now they don't wanna wait too long and are also happy to get smaller games as long as they are good value for money. Their attention spans just fade so quickly these days that even live service games struggle to cope because people gorge content like watching a TikTok and swipe off their game faster than you can say anything positive towards it.
On a more positive note, now Covid restrictions are being lifted gradually through the world, lets hope that we can have an E3 at some point again, as all things in life are cyclical anyway 🙂