Is stock imagery getting too specific?

As a stock photographer, you have to make your money any way you can. I suppose there are only so many saleable photos of 'businessman on mobile phone', but when you look at stock sites, you'll often find photos that are just a little bit ludicrously specific. The funny-guys over at CollegeHumour spotted that as well, and created this rather fabulous video about it:



So, the question - dear readers - is stock photography getting way too specific, or is this the only way that stock photographers can still carve themselves out a niche?