While he drops a lot of names in there (php, mongo, rails, etc.) I'd summarize it in a more general way - in the last 5 years the entry barrier to building highly functionable online apps has been lowered due to the rise of quality opensource abstraction layers and frameworks, and rapid exchange of knowledge/solutions through online hacker comunities.<p>What makes me happy is he's a proof that a programmer can spend 5 years under the ice and his programming skills are still valid, he just has to learn new toolsets. Also, I like how he quickly decided to <i>skip the whole Objective-C/Android Java scene and jump straight to HTML5/Javascript for making mobile applications, which I believe makes sense for the type of apps I’m working on.</i>, looks like taking a break from the market isn't that bad after all.
The buzzwords might have changed but for the last 40 or 50 years software has mainly been about forms (getting data into databases) and reports (getting data out of databases and formatting it for the user). 99% of the web falls into this category. Once you have been in the industry a while you see history repeat again and again. COBOL back in the day was a sexy as RoR is now...