There is an interesting article The Quiet Revolution in Programming published by Dr.Dobb's (Apr.2013), which confirms the trend of rising web technologies. There are two important findings of changes occurred in between 2010 and 2012.
1. Relative proportion of software developers using one programming language only has decreased significantly.
Not every programmer does implement web pages, which implies web programming is used for other purposes as well. Chrome OS style web apps philosophy increases the importance of web technologies in implementation of general purpose software as well.