According to Forrester Research, the future is in so called 'lightweight' and 'cloud' based applications.
Let me clarify the concept of lightweight being used here.Firstly, lightweight or agile means a framework having very small initial setup requirements and not only it invloves shorter developmental cycles, but also requires lesser maintenance and upkeep costs, once the application goes live. Mentioned in the abovementioned article, are the frameworks such as :-
Ruby on Rails
This is not a definitive list as such and much more can be added. However, if you've used atleast a single framework out of these, you'll come to the conclusion that these frameworks are quick to set up and run, and are flexible at the same time. It is not surprising that, given the post-recession economic scenario and the ever-increasing SOA adoption by the industry, these (and many such) frameworks are most sought after (read as 'hot') in the job market.