You're right about the glasses barrier. There are a lot of people that say that, but an large proportion of those change their mind once you have shown them a good quality film on a good quality screen (something like a Hyundai or JVC circular polarised lcd). They also tend to realise that cutting between shots, pans etc. is not such a big deal - and certainly doesn't cause headaches when done properly.
The viewing angle issue is really not a big deal either these days, there is less viewable angle than standard LCDs but you are still talking about a very reasonable viewing angle.
The implications of not being able to control the inter-axial distance between inputs (horizontal distance between lenses) when shooting precludes the use of single body 3D cameras in any kind of serious production environment. For the purposes of home experimentation there may be a market. Proper solutions include the P+S Technik mirror rig for closeup:
http://www.inition.co.uk/inition/product.php?URL_=product_stereovis_pstechnik_mirrorrig&SubCatID_=81 or side-by-side rigs for other shots (actually, small cameras like the Toshiba mini CCDs work well for closeups on side-by-side rigs).
Autostereoscopic (no glasses) systems are a long way from being effective for home use - Philips just canned their WowVX project, and the current best market players, Alioscopy, are a long way from producing a consumer product (>5 years I reckon).
I work with these technologies every day and recognise that they are not for everyone, but I'm sure that people will take up 3D home viewing for special events, like films and sports, as the technology for viewing with polarised glasses in the home becomes more and more affordable, and the content on offer becomes more and more attractive.