A number of companies are boosting their mobile development teams, but it will take time for this need to be filled with qualified people. Desktop software developers need a new set of skills to write code for mobile, so they get retrained, whereas new talent just isn't out there yet in sufficient quantity.
Development centers are also being opened abroad, although outsourcing is more hassle and involvement than internal recruits, but in today's fast-paced app development environment, some companies just prefer the quickest option.
It seems like a great field to be in right now, with employers bidding for talent, while a lot of other sectors are stagnating. This will inevitably change in a few year's time, when more people graduate, attracted by this lucrative field, but for now qualified app developers are having a field day, with their services in hot demand.