The first touchscreen phone was introduced in 1994, the IBM Simon. Yet the first true modern smartphone to get mass adoption was the iPhone, 2007. And truly massive adoption worldwide happened after iOS and especially Android took off, a few years later.
VR has been around as a purely techie idea for 30 years but we haven't really had the tech for something worthwhile until recently. I'd say that we're probably 5-10 years from mass adoption, once we have some lighter high-performance headsets.