Back in the 90's it was nerds that had some great ideas & skills, not so much on business. Some monetized (lucky ones), some didn't (most).
In the 00's the kids got smart .... saw the sole enabler was the VCs, so they ALL when back to school and got their MBAs or teamed up with MBAs. Wall Street got burned (2001), but they learned there lesson and now manipulate the boom-busts... and even doing reality "shows" (Shark Tank, TechCrunch, Kickstarter, even the kids are getting into it with their national competitions, etc...)
In the 10's the MBA's (which the VCs LOVE) now run Silicon Valley. Wall Street is heavily involved to tie ideas into existing corporations (Facebook, Google, etc...) for efficiencies of scale and funnel ideas back into the execs that run those companies since there's a lot of investor bulls that "long" those stocks. Some of the old school 'change the world' attitude is still there, but most of it are in VCs that have partners that ran those companies in the 90's.