At the end of the day, the Parity Clause is bad for everyone.
Obviously the big one is on the Xbox One owners, who have less games to choose from and play.
But it's also bad for Microsoft, who because of the lower amount of games present, receive less revenue from the absent sales of said games.
And of course it's bad for the developer, who now have to choose to either spend more money now for added console development for Xbox One, or no Xbox One development at all (or hope for a pardon from the clause later on).
Despite Sony fans not getting Shovel Knight at the start, I'm sure they're not complaining about getting the game now rather than never. A great game is a great game, no matter when it's released on your console of choice (*hugs Guacamelee which was released later on Wii U*)
Let's ignore the petty bragging and goading and see this as a gamer issue. More awesome games is never a bad thing.
I see that Xbox has seen it (the original OP in question). Prety cool.
