Draw me a unicorn

The recent talk about unicorns - Startups which passed the 1 Billion dollar valuation - Have started a goose chase by many VCs. Series A VCs are no longer interested in companies which would give them 5x return (ie - be part of a 5 Million $ investment, and receive 25 Million as part of a company's exit), but they need more than that.
So VCs are no longer looking for teams which can build 50 Million businesses, but a billion dollar business.

While that might make sense financial wise, it may actually kill the whole VC business, which is already dying. Super angles and private equity investors are already taking their place not just in seed but also in series A.
Startups might just be better like that.