It has always been this way, especially with photo, video, and television innovations. Quite a lot of computer innovation as well has been driven by the "need" to distribute porn and eroticism conveniently, quickly, and cheaply. The military invented the internet, but popularity and uptake was driven to a large extent by porn, as was the demand for increased bandwidth. Virtual reality may be able to accomplish a lot of stuff, but the real money is all in whether it can get you convincingly laid with the partner of your choice. Porn was a big driver in the dominance of VHS tape over Betamax (Beta only held 60 minutes of footage while you could put 3 hours of movie onto VHS at standard full-quality speed). Your bank debit cards, paypal, and other convenient (and private) online electronic payment methods are all originally the result of the need for people to pay for porn discretely. Google Glass may be out of vogue at the moment, due to privacy concerns, but what will likely resurrect interest is the apps for it that will allow you to see yourself from your partner's point of view and record the action all with voice command.
In the olden days of yore, Gutenberg may have printed the Bible, but what really got printing going was the ability to distribute more popular and exciting material to those who wanted it. Mass production meant lower costs, consistent quality, and more customers. Same issues as today - more bandwidth means higher definition and faster "service".