My belief is that the focus on exits in startups is an American effect in nature - because it matches the VCs business model. Why not just building sustainable businesses and make VCs do with dividends on them? That will be way more beneficial to the economy than building Zynga-style bubbles.
VCs routinely reject startups because they worry that the founders are only interested in selling the company. We tell founders who are about to present to VCs never even to use the word "exit."