... The founders are younger; the pace is faster.'
And the quality is far, far lower.
While I may be a luddite, I truly believe that the progress of software innovation reached its peak circa 2007. Since then the quality of applications, usability of UIs, and generally the overall value of software has declined overall. In some sectors precipitously (web pages, window managers, tablet/metro style interfaces), in others a a steadier pace (office suite, web browsers); at best the industry has managed to simply maintain a moderately acceptable quality level(clis, email clients).
But more critically, the progress in building the infrastructure we need has effectively stopped completely. We need encryption by default, a distributed web, and software which interacts seamlessly with all of this. I don't see that the current bloom of App-creators is either willing or technically able to carry the network or software in general into its next stage of development.