It should be obvious to anyone who's been involved with bikes for a number of years. There aren't enough new entrants to this sport to support the volume the manufacturers are used to. So they have to keep re0nventing the wheel bringing out NEW stuff different enough that that they can hype it as better by enough to get folks to replace existing working bikes and feed the monster.

Expect lots of press about the virtues of 650b vs. the current 26 x 1.xx size.