while I'm skeptical of this ever coming to fruition (it's exceedingly rare to see that kind of investment on what is only sort of a new attraction), I think the sensation of going on a ride without a track is still pretty special. while you can, if you're looking closely, see the requisite skid marks marking your path, I find it much easier to immerse myself in an attraction when I can't see an obvious track.
is that worth all the headaches that come with it? probably not! a great ride that's closed isn't any more useful to a guest than a cruddy ride that's open. but I definitely dig the concept and applications I've seen it used on.