Those are induction fluorescents, not plasma. Plasma is a whole different ball game. It's more similar to metal halide, but with the efficiency and lifetime of LED. It's also about double the cost of induction fluorescents.
The only reason that any of these lamps is getting the lifetime stated is because the electrodes are gone from the lamp package. They are the part of the lamp that is sacrificial, and limits the life of the lamp (other than phosphor degradation, at least in fluorescents).
80F bulb surface temperatures is a load of crap BTW. It's a lot lower than your typical fluorescent at the same wattage, but it isn't that cool. I got a chance to play with a 70W Fulham induction lamp a few months ago. After a few hours of running, it was very uncomfortable to put your hand on for more than a second or two. Wouldn't burn you, but certainly isn't fun to hold. They hold some promise if the costs can come down some, but you never have to worry about bulb replacement.