If all these hype turns out to be positive and with DS equipping itself with this technology then PSP, Zune, Ipod etc. etc. and all those claiming to give the best portable entertainment is in for some deep sh*t competition. They should better come up with something new or adapt this technology in their upcoming device!
"a great sensation of depth without making you feel as if the image is coming out from the screen"
I'm pretty sure this isn't because of the paralax barrier technology. But because the screen is too small or maybe the application was disigned so that the 3d stuff goes on behind the screen.
Paralax barrier has almost the same effect on depth as 3d shutter glasses.. on a screen of the same size that is.