IF it becomes a success it will be thanks to ero. The same statement applies to 3D printing, to a lesser degree.
The tech is already here, if nascent. However, like printed sex toys the scene is fragmented and niche, nurtured by open-source/indies but only to the limited degree they can. To go critical, there will need to be big players to drive standardization and adoption. Then the upwards spiral will kick in, as hype drives content/development which drives hype.
And like the Internet, going big time means side perks from the new technology, like virtual museum tours or whatever.
>Take your fantasy, for example
I'm anticipating growth in motion capture. Puppetry of humans ala porn studio is all well and good, but puppetry of data, of 1's and 0's has wide possibilities - wider than whatever single example you just thought of.
Unfortunately it takes too much work to properly emulate living activity. The process can be hastened by use of canned scripts and assemblies and libraries, but instead of bloat and lag like with overabstracted code, you get uncanny valley.
So, again, I anticipate growth in motion capture. And whoever pegs real-time motion capture is going to be rich.