Its a highly misleading portrayal of web browsing on 4G on the iPhone. Apple has designed it to look better than it will be. Just like how great siri is on the adverts and yet in real life it sux balls.
The UK Advertising watchdog has smacked down Apple a number of times but in the USA you can claim what ever you want without issue.
I totally disagree with that. This is an actual web page being displayed and that same page would look the same on your iPhone, which is totally different from those ads by others which note at the bottom "images simulated" or something.
As for Siri, she responds just as depicted in the ads. The fact that you then expect her to do X and Y, and she doesn't, is not a fair critique. (You didn't provide detail, so I'm just guessing at your criticism - feel free to elaborate.)