The minute I saw Cuphead during the E3 presentation for Xbox One, I immediately was thrown back to a special era of animation. Back to a time where it was uncharted territory and whatever you felt like making could be created because no one had bothered to try before. Seeing that 1930s animation style is something to be had. Unfortunately, it's an experience only to be shared with Xbox One and PC users, and the game has been revealed to be exclusive to Microsoft and won't be coming to the PS4.
A dev from StudioMDHR Entertainment confirmed the news on the NeoGAF forums when asked if the game was exclusive. Their response went like this:
"Yes, this Cuphead game is exclusive to Xbox and PC (with Steam and Win10 versions at launch and a GoG release likely shortly after). There will likely be a Mac version down the road and possibly a Linux version beyond that (unless we lose our houses or whatever). We own the Cuphead IP."
A little depressing that PlayStation 4 owners will be left in the dust, but at the same time it's great to know that there is a PC version that will be on GoG and Steam, and that they're working on other versions for Mac and Linux.