You make a good point. I think it's also important to keep in mind that mobile may be growing but it's also becoming increasingly difficult to build a software business on mobile. The top 20 apps on both leading platforms are gimmicky IAP games and users have been trained to complain about paying more than $2 for anything.

If I were starting a new software business today it's very likely I'd completely ignore mobile and focus on the more lucrative desktop/business market.