Tabassum_1 :
Tech companies are putting so much in immaculate branding and marketing of their headsets prior to release (as the Vive is delayed till Q1 2016), the main obstacle I see in mass adoption, even after the acceptance by public, are the prices.
For a mass adoption of VR headset of any race, prices should need be at a reasonable scale for general public to buy. We should not forget the current economical chaos happening i the world and this might affect the sales of virtual reality devices as well.
Mass adoption is going to take some time, regardless of price. The best way to get the public on board (coming from someone who's had the chance to play with VR many times) is to get the public trying it out, and spreading the word.
If you're buddy comes home from PAX raving about VR, you'll be interested to at least experience it yourself (hypothetical, generalised situation)
Economic issues will certainly have an impact on adoption, but there are plenty of people with money to burn that will be the early adopters. I expect to see HMDs priced between $400 and $600 (purely speculation, I don't know anything official). VR wont be selling as fast as the average console, but when people jump to buy $600, $1000 and even $3000 graphics cards, there's room to sell VR headsets in that market.
In regards to the Vive delay. That is absolutely false.
HTC has maintained since the begining that it will release a limited run of Vive units this year. At no point did the company say it would be widely available.
The headset will be shipping this year in small supply, and ramping up in early 2016.