Original Link: http://www.sencha.com/blog/the-making-of-fastbook-an-html5-love-story/

When we started what became Sencha, we made a bet on the web: a bet that modern application development didn’t need anything except the browser, a great set of frameworks and a great set of tools. With those three weapons in hand, we knew developers could build applications that would delight users. The advent of HTML5 upped the game and it gave developers even more tools to let them treat the browser as an application development platform and not a page rendering engine. Developers sprang at the opportunity and unleashed a torrent of apps — on both desktop and mobile — that leveraged the new HTML5 capabilities to build amazing applications using web standards.

So, when Mark Zuckerberg said HTML5 wasn’t ready, we took a little offense to the comment.

We thought to ourselves: HTML5 can’t really be the reason that Facebook’s mobile application was slow. We knew what the browser on modern smart phones was capable of and what kind of rich capabilities HTML5 offered. We saw the latest generation of mobile devices — running at least iOS 5 or Android 4.1 — push ever increasing performance and HTML5 implementation scores. But perhaps most importantly, we’d seen what our customers were building and the amazing things they were creating using HTML5.

Interesting post from the guys at Sencha who wrote their own app to demonstrate that it’s not a matter of HTML5 being “ready” as much as knowing how to use it right..