No other retailer creates such artificial constraints for indie authors. (huffingtonpost.com)
Further into the patent application, Microsoft notes that «Optionally the input control may use Natural User Interface (NUI) technology which enables a user to interact with the computing - based device in a natural manner, free from artificial constraints imposed by input devices such as mice, keyboards, remote controls and the like. (patentlymobile.com)
Procedural generation changes that dynamic as the game world is generated by an algorithmic procedure and can be essentially infinite (limited only by artificial constraints put in place by the game developer or by the computational restraints of the computer system hosting the game). (howtogeek.com)