I'm not sure why you think that. From what I can see, the undergraduate college experience of today is basically the same as it was in the 1980s. And since then we've had the entire rise of the internet, mobile tech, social media, and all the rest of it. Kids still live in dorms and sit in lecture halls and listen to professors lecture. Why do you think it's going to be much different 15-20 years from now?
Sure there is a lot that can be done online, but that hasn't really impacted the fundamental experience of "going to college" for most young adults who decide to do that.
The cost and benefits have fallen way out of whack. The average college tuition has tripled (after inflation-adjusting) since 1980 [1]. Meanwhile, an increasing number of college graduates are unemployed, and the wage premium for a college education is declining.
The college experience hasn't changed much (indeed, if anything it's improved) because colleges are sinking large amounts of money into providing a good experience. That, after all, is what a lot of students base their purchase decisions on. But the point of college isn't to be a 4-year party & vacation, it's to get an education that will help you the rest of your life. Increasingly a college education doesn't help you lead a better life.
Sure there is a lot that can be done online, but that hasn't really impacted the fundamental experience of "going to college" for most young adults who decide to do that.