There has been a rise of an entrepreneur friendly tech ecosystem but I don't believe that is why we are seeing more startups.
One of the underlying notions of modern capitalism is the division of labor. Our economy is more efficient when each of us specializes in one skill, and we built our education and economic systems around this idea. We study accounting to get an accounting degree to become an accountant.
The beauty and draw of a startup is that, as a founder or one its early employees, you get to wear many hats. You are creative and technical, an accountant as well as a designer, and I believe that is incredibly alluring for those who believe they have more than one skill to offer. In fact, I believe excelling in multiple skills is more natural and innate to people than choosing one, and sacrificing others.
Hence, as startups tempt more people to, I believe we'll also see some other shifts - companies, who want to retain employees, will offer them the chance to work multiple roles, in a sort of rotation policy. Universities and school will change how they educate. We'll stop asking students to choose one favorite subject and drop all the others. Instead, we'll create degrees that contain multiple subjects curated by a common thread.