SEGA games need to be on all platforms. Fuck this exclusive shit. It is in their strategy to expand to more platforms anyway, so it will benefit everyone.
If anything, this deal with Microsoft should help expand their series to PC and Xbox when they weren't there in the first place. This has already happened recently with Yakuza. My guess is that Altus games will follow suit, with SEGA behind them pushing for more multiplats. The move to UE for SMTV already speaks for itself.