Got it during an eShop sale, mostly because of the Zelda themed level but I haven't touched it yet.
It makes sense for SEGA to bring more games to PC though. Sonic Colours HD would be a no-brainer and I believe it would be worth it to also release Resonance of Fate, Hatsune Miku, Bayonetta, Vanquish and Yakuza among others on Steam.