There's nothing about plasma that makes it better, it's just that companies that were setting the stage for 3D stuff made plasma displays. But from what I know from talking to the people at the companies, there's nothing fundamentally different in any "3D Ready" television that makes it notably different than, say, a standard LCD flat-panel monitor hooked up to a computer, except that they were shipping TVs that had the firmware to handle future 3D formats that may or may not ever actually come out. Samsung went heavy into this in their DLP and plasmas last year, but the partnership with DDD for new content hasn't gone anywhere yet that I've seen.
Anyway, my point was simply that most televisions out there now could serve as 3D displays with the use of glasses, but that the interesting part was that many of the display manufacturers are trying to seed the market with TVs that have the interfaces and firmware for a unified standard. (There is no unified standard, though, and you know how well preemptive standards work.)