The market's horizon depends on the world's population time preference and risk aversion as a whole, not on the whims of venture capitalist.
Why? Because arbitrage. If the world as a whole has a low rate of time preference and risk aversion, investments will flow towards high potential long term projects rather than short term ones.
But what if you're a greedy, myopic VC with high time preference who wants to make money now? That doesn't affect too much how you will value deals. What you care about is how much money you will make at the exit, which will depend on the equity valuation at that point. And that valuation, depends on the global investment's community risk aversion and risk preference.
Facebook trades at a P/E ratio of 71, meaning the equity is worth 71 years of current earnings. Netflix has a P/E of 116. Think that's shorts-sighted?
Ultimately, investments come from two sources, money saved and invested by individuals, and banks.
If it were only the first, you could say that the type of investments you see reflect the society you have. As a whole, society picks taxi cabs now rather than maybe some pharmaceutical product later. It's not capitalism, it's human nature.
Banks complicate the picture, since they turn their deposits into loans of various maturity. The rates on these loans are ultimately tied to central bank policies.
However, these policies generally attempt to keep rates low, so as to stimulate "productive" investments. In addition, various bail-out guarantees tend to artificially increase the amount of risk taking.
So there you have it. Capitalism by itself merely represents the time preference and risk preference of the population as a whole, and central banks tend to make it more risk taking and longer terms than investors would actually prefer.