The article seems to boil down to timeframe and the idea VCs want to make money now. (nothing new there)

If you really are passionate about and believe in what you are doing, you'll do it anyway even if the market/segment is "small".

Small markets can often be the most lucrative (loyal, willing to pay more, etc.), especially if people love the products you make.

There is nothing wrong in making apps just for the iPhone etc., people like Tapulous are doing well by it.