You can disable what's new? I think you can set your PS3 not to start on it, but I didn't know that it could be be disabled.
I disagree, there's no realistic way to push ads on XMB without having a major redesign, the image I posted is a testament to how hard it is to implement ads that everyone sees on XMB.
Actually, the blades did somewhat lend itself to advertising. The problem was the limited amount of space, they only had two windows in which to advertise/promote content.
I think it's just being a realist. Sony themselves have talked about content discoverability and that's hard to do without advertising. How can you ensure everyone who uses your console knows that there's a new game available in the store? Sending messages might work, but there's no guarantee everyone will read it, advertising removes those issues.
The real question is will they take it as far as MS in having non gaming related ads? Will they have an ad for Lynx/Axe, McD, Mountain Dew, etc? My feeling they won't, but I think game and store related ads will be a big feature in a couple of years and that's a good thing as it makes it easier for me, as a gamer, to know that's a new game on the store without having to do anything more than turning my console. If that ad links directly to the game so I can purchase it or download the demo as is the case on 360, even better.