Just watched a dozen previews of new movies coming out. Every one was advertised as either Real 3D or IMAX 3D or both. I doubt theaters are moving into the past by dropping 3D. They have had a resurgence in revenue growth because of 3D over the past 4 years. 3D option to watch is becoming the optional choice for same title, just as IMAX format screen also is an option. Choice is good.
The only people I ever hear complain about the glasses are posters on these forums. Never hear anyone at the theaters complain about the glasses. Only people who pooh pooh 3D in the home seem to be those who haven't seen it on their 3D TV or those who don't even have a 3DTV.
Large screen 3D definitely enhances the 3D effect. But sitting closer to a small screen will also work. Unfortunately, to get a good 3D that is truly large screen, 100" or more wide, you need a projector and these are all active glasses. A few passive systems are out but they suffer in picture quality. 3D doesn't need saving.
As for TV channels, the offering by Comcast is quite good. Netflix also has a bunch of 3D programs, and Amazon just started offering titles. Vudu has some great titles but since many were released first on Vudu, before even blu Ray release, the price is high.
To get what 3Net offered, you can still find these programs such as the 3D Red Bull sports documentaries on your PS3 on the Sony channel, some free, some costly. I have quite a few 3D downloads from the Sony Channel.
As for DirecTV itself, I worry it may soon die. Let's see if the M&A goes through. I suspect that once they become private, or bought out they will whither and die, unable to grow enough to keep new programming coming.