Wasted investment? The thing that really sucks about this is that I do in fact agree that net neutrality is being violated here and it's time for the caps to go. But my family likes the Xfinity service on XBL. (I'm not a big fan, but my wife, son, and daughter are.) Being that we have only one provider in my neighborhood (Comcast) it sucks that this argument is likely to change this service in some capacity eventually.
Being a CCNA I definitely agree that Comcast is playing shenanigans with the description of the inner workings of this service. This service could leave Comcast's network easily since it is IP based. It is duplicitous that they are stating that the fact it does not route through the internet cloud as the reason this doesn't violate net neutrality.
Blame this on the Comcast management executives who are only interested in LARGE profits and uncompetitive behavior over modest profits and competition. This service could and should be available to anyone wishing to subscribe to it. Not just Comcast cable subscribers.
If you really think about it, the whole requirement that you must be a Comcast cable subscriber is actually a limitation to the money this service could make for Comcast were it available to all on the internet. But hey, corporations have been willing to "cut their nose off to spite their face" for years.
HBO Go seems to be caught in this very same dichotomy. HBO Go is great but its useless to me since I already own a Tivo and record anything good on HBO already. As far as my household goes HBO is a complete waste of investment dollars from HBO. I imagine there are a lot of households like mine as well. Xfinity and HBO Go could make loads more money if they were available to all.