My hunch is they're working on all the newer buses first and maybe if there is room in the budget, they'll put them on the NG's but the NG's are next on the chopping block after the OG's so it's probably more economical and helpful in the long run to install them on the Xcelsiors, even tho NG's are getting OMNY but OMNY ties directly with fare collection. I think they're working on the 2014/15 Xcelsiors currently, and my guess is the 2016/17 XD60 order may be next (could potentially be 2011 NovaBus LFS, 2011/12 XD60's, doubt the 3G's are getting them). Last batch of NG's to receive the screens I believe were Eastchester's batch. This is just a hunch, feel free to correct me!!!