The only additional cost associated with 3D HDTVs will be additional sets of glasses and sooner than most realize.
I can already find 240hz 3D ready 42" LED backlit HDTVs for just under $2,000. That's hardly a premium price for a name brand TV with LED backlighting.
Based on what you're saying, it seems you would have people believe that most homes interested in leading edge technologies like 3D either don't have at least one HDTV or have plans to buy one in the near future.
Prices are going down, it absolutely is a factor, and a portable solution is no substitute for the typical household.
It's a pointless argument to say that those who can't afford big screen TVs can and will prefer to just watch movies on a portable DVD player instead. Or a 3DS game system for that matter.
