I saw the 2017 CVO breakout and they still have the 110 motor
whats the story behind that 
The new engine is only being rolled out to the Touring line at this time. It will be added to the other models in the future, probably next year I would guess. That's a normal method for Harley when bringing out new stuff. When it was CAN bus electrical systems they started with Softails, then later Dyna's, and only recently (2014) did they add it to Touring models. Same with the original Twin Cam which was introduced in Dyna's and Touring models first, then later the B model engine with a balance shaft was introduced for the Softails.
As for why a company might do things this way, one reason is a lack of enough engineering support to keep that many balls in the air at one time. It also gives them an opportunity to try to debug things on only one platform before expanding it to the entire model lineup. That was the idea behind launching the new Twin Cam with Cruise Drive in 2006 on the low volume Dyna models. Unfortunately that one didn't work out so well, as the folks who bought 2007 Touring models will attest.
Jerry