Insert the usual disclaimer, this only applies to me, it's based on my experience, etc.
Maybe it's just me, but it seems that everyone who went to Uni thinks you should go to Uni, and everyone that started working immediately after High School recommends that you should do that. Bias anyone?
Here's my bias. I went to High School, then attended University. I also worked while I was at University. I'm not a guru, I'm not a superman, and I don't claim to be. In my experience though (in general), if you want to do the really sick, high-level hardcore stuff in the business world, you need to go to Uni. You want to be an entrepreneur, you don't have to go to Uni. You want to be a techie, coding all day, you don't need to go to Uni. You want to move beyond coding, you probably need to go to Uni but may be able to get out through sheer effort.
It all comes down to your personal motivation and desire to learn. You don't need to go to Uni to learn. But, Uni will give you social and analytical skills which can be difficult to develop elsewhere. It's also an easy way to be exposed to lots of theory, quite a bit of which you can apply to what you do if you're creative. There's nothing technical I learned at Uni that I couldn't have learned elsewhere. But, I still get value out of some of the non-technical things I've learned.
I think the real impact is when you turn 30 plus. If you're a HS graduate without Uni qualifications and you're not working for yourself at that point, I think you might be in trouble. Of course, it all depends on what you count as success. If you love coding, then you'll probably be happy with where you're going. If you want to do interesting non-coding work but don't want to shoulder the long hours and risk of an entrepreneur, you might struggle to find a firm with enough capital or leverage to let you do what you want that is willing to hire someone without a Uni education. I don't know for sure - it all depends on being in the right place at the right time anyway.
But, it all depends on the individual. Someone who is motivated and a thinker is going to make their own luck and success, regardless of whether they went to Uni or not. Anyone who claims otherwise doesn't know what they're talking about.
The long and the short of it? There's not one answer. You need to do what you feel is right for what you enjoy and for where you go in life. There are no absolutes - going to Uni will not guarantee you a job and it won't guarantee you an education. It may give you more options, but not necessarily more than a motivated High School graduate could get. Short-run advantages don't always lead to long-run gains.
Anyway, that's my opinion.
"No Silicon heaven? But where would all the calculators go?"