I dont think there's much they can do about moneyhat deals.
However incentives to buy games on Steam have already happened such as what happened during the Lunar Year sale where they offered a discount on top of purchasing a certain amount of games, something that they never have done before and something that third party resellers usually do.
So as a consumer, this is a huge win for my wallet.
There hasnt been a single game that is on EGS that wont be coming to Steam (excluding Fortnite which Epic owns and possibly Ubisoft games which are already better price value than what Steam or EGS offers in the first place due to the example I provided in my previous post above).
EGS is gonna have to step up and like GOG (where they had a policy to be against VNs only to be reversed due to the success of VNs on Steam) they are gonna be forced to make changes to the policies they mentioned when they first arrived - such as in their stance for support forums, user reviews, cloud saves, etc and of course third party key selling - these are all things that Epic said that they wont provide because they believe "Steam has too many features". They'll eventually be pushed by Steam's success and will provide them - overall in the end I believe its gonna be a Win win situation for all PC gamers.
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.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454