Listening to the Town Hall now. The answer is: not necessarily.

They general view is that the underlying chain tech is not a big focus for WMG or even Splinterlands in the future. The same way that most users don't care if their web2 stuff runs on Azure or AWS, end users of web3 stuff won't want to worry too much about what core chain runs a game.

Splinterlands itself envisions a world where their assets (e.g. SPS, Cards) can exist on many chains. Sure, the core game runs on Hive, but most users won't need to know that.

While this might not be the news that folks who are highly invested in Hive want to hear, there should still be indirect benefits for the Hive ecosystem from this partnership. I can think of a few but it's up for debate and kind of a different discussion.