My exact concern too. At this point I am sure they already have most of the sales they are going to get, and I wonder what the incentive is for them to keep developing the poly. I sure hope I am mistaken, but the super super slow pace of development here is worrying, especially when the timeframes chord keeps telling us are never met. And chord seems to have pretty much dropped off of this thread too. I am sure its because of the negativity, but the negativity is unfortunately well earned on their part now.
The whole interface-less idea is a nice one in theory, but the reality is obviously less than ideal. If you do not want to have to build your own software and interface, you need to make sure it can use any and all popular standards. The reality is that the poly is still missing some major connection standards (google cast, spotify... which is even mentioned in the manual). And there are only a few third party apps that actually do dlna or mpd.
I hope chord turns it around and actually gets the gofigure app out to android, and actually implements the remaining features they have been telling us they are going to. While I fully expect the app to arrive (at some point) I am not confident about the missing features.