You know the pace in tech these days,last years tv or cell phone is outdated today,so i guess this is latest tech,but when the led tv was kept next to regular lcd,the lcd was richer,so when you play them next to each other thats when you notice,so its hard to make out diff when you see it solo,but tech moves fast so things would reach such levels pretty soon am sure.
3d tvs run at high hz anyways,otherwise you wont get that 3d effect.
You must be sitting really close to the tv to get that 3d feel,sitting far away kinda dampens things.