Blu-Ray has lost its premium cost which only took about three years after its introduction. Budget players can be found for not much more than $100, and if you don't pay regular retail price on media, typically you won't pay more than $5 over the cost of the equivalent DVD. A large part of that had to do with the current adoption rates among consumers, regardless of whether it's only 13% or whatever the actual number happens to be.
I'm already seeing 47" 240hz 3D ready HDTVs for just over $2k (with LED backlighting) so the current additional costs are not as extreme as some want to make it out to be. Arguably, the most expensive thing about 3D lies in the number of pairs of glasses a home ends up buying.
I really won't be surprised if we start seeing 3D capable HDTVs (in the 40" range) under $1,000 within the next 1-2 years.
As for autostereoscopic displays, the technology needs to be further refined before it's viable for large screen displays due to limited 3D viewing angles. And yes, I'm sure they'll be more expensive when the technical issues are figured out for general consumer use.
