I'm sure it won't change much - but if it fixes USPCC's awful registration problems they've been having this year then some good will come of it.
Cartamundi seem less super-strict on the copyright debate. They happily printed that rubies cube inspired deck after the design was rejected by USPCC for potential infringement.
I've been working with Caramundi this year on my own deck and I've been really happy with the service, professionalism and the quality of their stock. Cartmundi took a big leap into professional playing cards a couple of years ago (hence Ellusionist's switch to them) and the quality is fantastic.
I love USPCC stock too, so I'm happy that they'll be continuing with that. Cartamundi have been innovating a lot these past couple of years. I just hope the lack of competition doesn't create a problem down the line...