So the bottom line is that we need the convergence of these two vectors to make blockchain a dominating force in the gaming industry. First, the blockchain tech should have the capacity for running multiplayer games that major video game developers like Blizzard, Valve and Ubisoft produce, no trade-offs here. Then, we actually need the games like Warcraft, Counter-Strike or Far Cry that can be played on blockchain, to make it matter. Only after we get there, the gaming industry will likely become a primary driver behind cryptocurrency adoption.
Although its not impossible to integrate game engines and blockchain tech altogether, the technical difficulty is very high because MMORPG's is a real time event based system that it cannot wait several confirmations for a transaction / event to successful.
I only see it is more likely that these game developers would most probably adopt cryptocurrencies as in-game currencies, subscription payment, etc... Imho.