I hope you're right on this. What I fear is that some will see that you don't need a great store, just enough money to burn on moneyhatting the big releases for their own shops, and start more competitors (or some established ones with much money behind, like Origin) doing essentially the same thing like Epic did. "After all, it worked for them, so why wouldn't it work for us?" would probably be what the corporate bosses in the industry are thinking right now.
Assuming it actually works for them is when you need to worry about it lol.
Notice how they dont mention the success of any other EGS released game other than Metro (which for a week or so was being sold pre-ordered on Steam and was in the top sellers list for the entire week it was available) and The Division 2 which was available on Uplay and you can get a better discount on Uplay if you had Uplay points/coins than on the EGS Store.
Its gonna be interesting to see how the overall sales amount is after 2020 ends.
I mean the publishers will be happy getting a lump sum of money from Epic and then selling majority of the game on either Steam or GOG.
Its gonna keep happening but I think in the long run, it wont be as bad as you think it will be.
A lot of people said that Xbox360 would kill Playstation 3 with all those exclusivity deals that MS had (Star Ocean being delayed, Saints Row, Dead Rising, etc)
Look where the successors are now - I think its gonna be close to that if anything.