Well, a bit propaganda/marketing.
This advertisement states slow startup and poor performances of HTML5 on iOS, and it's true.
What's the article fails to mention is that those poor performances are mainly due to the bad support of html5 gaming/app on safari's iOS default browser (lack of WebGL support by default for instance).
It's marketing for a (apparently) working solution to convert flash apps to native apps.
That's a nice tool and solution for sure.
But HTML5 hasn't failed as much as the article wants to state. On desktop computers, I think HTML5 gaming support in most recent browsers is more than decent.
Thanks to wrappers like cocoonJS and appmobi, I guess you can get decent apps on mobiles.
Also, at some point in the future hopefully there will be Firefox OS that will aim at low budget mobiles (and possibly at high end too for the more geeky/freedom-thirsty users) based on a linux core and providing a firefox browser as interface of the OS, supporting HTML5.
So imo, the link you gave is a marketing text operating on misinformation to sell what could be a short-term solution today. But I don't think HTML5's state is as bleak as this advert likes to say.