On this Youtube link :
youtube unlimited detail
A user comment is :

hm Unlimited Detail, even if they're only rendering the points that are needed, they still need to store all the detail somewhere.
unlimited detail needs unlimited memory
And i don't think they invented unlimited file compression.
A Polygon model with ca 1 mio. triangles needs 105 MB of disk space (saved as an .obj-file, I'm a 3D-Artist myself)
I don't know how this thing works, but i'm sure if it was as good as they say, they would've found a taker

I think it has undertand the main problems , and yes if it was a great technique like said , it would have been taken by a company already !
So when they say it can run on any PC even a SmartPhone (when you know the little memory on it sometimes : hummm hummm... !

If i would have to bet on a technique for next year , i would
bet on Direct X 11 Tesselation system, when associated with shaders you have alos lot of polygons in your scene also !
(and LOD tesselation also , maximum only when camera is near) !

Hardware tesselation

It is already used on Alien Vs Predator on PC also !
No years to wait for it, can be used in last 3D Cards !