Eh I don't know as long as it isn't downright arrogance (which this isn't IMO) I see no problem to advertisement like this. Besides people like it; they enjoy to see their favorite company do a bit of poking fun/trash talking to their competitors. 

Here's what I picture when I see advertising like this. You're just minding your own business when out of the blue Peter Griffin (yes the fat animated man from Family Guy) comes up to you, pokes you with a stick and says in his iconic voice, "hey you there, you suck" and then procedes to skip away while doing his signature laugh. You can't help but chuckle along at the sheer ridiculousness of it.

The Problem is as long as the gamers don't change their taste back it won't be easy

Knack is ULTRA High Quality but a bunch of meatheads probably waited for a CoD announcement or waited for something with bald space marines.
Something like Knack isn't cool enough in these days no matter how good those games are.

Will be interesting how they handle the thing with Destiny.
Sony managed to get the new "CoD" with Exclusive Content from Activision after it was rumored to be Xbox Timed Exclusive for a long time.
And the 360 did survive thanks to CoD and the Mappack Deal with Activision.If Destiny gets the same impact they won't have an problems in the NextGen.

Considering most PS consoles are shaped like a rectangle box.......ironic.

This is just a hint that Sony will be cutting costs on packaging by shipping the PS4 in a bag.

Another Usher performance?