"Full Stack Startup" is clearly not a new idea, as tptacek mentioned in his comment; just a modern application of an age-old business concept. Rather, I think hackers as a whole have simply become much more business-savvy since the Dot-com bubble, which was obviously a low point in collective business wisdom. As a result, they are increasingly choosing smarter, more sophisticated business models (i.e. vertical integration) and distribution strategies when building their companies.
It also shows that the "disruption" of the MBA is now more or less complete. Business principles and fundamentals will never change (just like human nature doesn't change), but the practice and application of those principles has changed drastically as a result of the Internet, and I doubt MBA curriculums have been able to catch up, simply because most of the people involved don't understand the core technologies driving these changes as well as hackers do.
On the other hand, we've seen the rapid growth in the number, size, and influence of hacker-friendly institutions like Y Combinator, which for all intents and purposes is basically "Business School for Hackers" (let's be honest). YC brings together people who already have a deep knowledge of technology, and helps them make better business decisions while building a strong professional network in the process (the latter of which is cited as the main/only benefit of an MBA). The same goes for hacker-friendly business methodologies like The Lean Startup.
The reason terms like "Growth Hacking" and "Full Stack Startups" become a thing in the first place is probably because they started off as "hacker dialect" for traditional business terms and concepts (Marketing and Vertical Integration, respectively). "Marketing" has for a long time been considered the exclusive realm of MBAs, but obviously that's not the case anymore, and using a term like "growth hacking" was probably a way for hackers to "take back" the concept and make it their own so to speak, though obviously that term has since become severely overused and bastardized.