It isn't really progress. This was around in 2005 as I had tested a "3D" imaging screen for a medical device. In order for this to work, you need to move your head into a position indicated proper by an LED light at the top of the screen. Then you'll be able to see a 3D image on screen. If you move your head an inch, the effect is broken and you have to re-adjust to get it right again.
I believe they acheived this effect with "pixel tubes" designed to be directed or pinpointed at one eye area or another. That is why a persons head has to be exactly in one spot.
And for the life of me, I can't see how anyone would prefer their head in a fixed position and feel that is preferable to glasses.
The technology may have improved over what I saw in 2005, but back then it never took off. Maybe they are just trying again to push the dated tech back onto the market and showcase it as new.
At TI I spent more time than I care to recollect or document worrying about the pure and simple optical physics and technological barriers involved with making "glasses-free" 3D.
The conclusions we held at the time was that 3D visualization effects such as a holodeck would simply not occur within the realm optical physics as we knew them at the time.
To see these guys doing it to a non-zero degree, albeit in limited scale and scope and yes of course at something less than perfect implementation is still awe-inspiring nonetheless. Not as an enthusiast but as an engineer who worked on the very same problem.
The progress they are demonstrating today is different than in 2005 in that we are seeing a commercially viable mass-production amenable approach.
IMO it's the difference between Nasa building the shuttle to ferry a select few into low-earth orbit
at any cost versus Virgin Galatic finding a way to bring the experience to the masses at a fraction of the cost. (still spendy, but within the financial means of probably a hundred-thousand to one million people I'd speculate)
So it's a limited field of vision effect at this stage, its progress because its affordable. Wait 5yrs and everyone's cellphone, laptop, ipad, in-vehicle DVD player, etc screens are able to do 3D without glasses.
To me this smells of pure game changer in the sub-20" screen markets.