So basically the Silicon Valley VC ecosystem is reinventing secondary markets for equity shares. This scheme has the same basic purpose as traditional stock markets (i.e. capital formation for companies and liquidity for investors), but is limited to a restricted set of participants, and price formation occurs only during specifically timed liquidity events (rather than continuously). I wonder if investors and founders are really happier this way than they would be on the public markets. If you are an early employee and you want to buy a house (or whatever), would you rather be able to sell your shares at any time to the best bidder or be stuck waiting for the next liquidity event at who knows what price?
I think this is an interesting development for a couple of reasons. First it probably is indicative of the huge regulatory burden involved with going public (Sarbanes Oxley &c). Second it shows how much capital really is available in SV VC these days. There is so much money that founders and early investors don't even care about access to capital available in the public markets because they can get all the cash they want without having to leave the VC world. I wonder if we will see a shift back to the public markets if the VC money ever dries up for whatever reason.