I don't remember ever seeing an ad showing a new invention. That is actually not the purpose of advertising. You can't understand a new concept in the time lapse of an ad. In fact, you'll see that new inventions normally become popular via other means (targeting niches firsts via specialized magazines, conferences, etc.) and only use advertising when they already have an established business and market.
The fact is, most advertising is just about manipulating peoples feelings. The first kind is about brand aggrandizing, trying to change how people feel about a specific brand--this brand is "quality", "fresh", "young", "elite", whatever. The second one is about stimulating demand, normally trying to make people need things they did not need before: "you are fat! buy our cream!", "your life is boring! buy our holiday packages!", "you look ugly, buy our clothes!", "you could be healthier eating our pro-active meta-splendidous yogurt!", etc. In either case, the goal is to make you feel bad, incomplete, until you spend your money on more shit.
Personally, I would love to live in a world with almost zero advertising. I am from Spain and one of the things I love about Berlin, where I live, is the low amount of advertising in the streets compared to anywhere I lived before. That is changing slowly though. But I have seen pictures of DDR Berlin and there is literally no ads. Of course, sadly that package came with the STASI and other horrible things. That aside, I would love to be able to walk the streets without having to look at ads telling me to buy shit over pictures impossible women in lingerie, rich men in expensive cars, smiling youngsters partying together, families on vacation in the Bahamas, etc. I know people that consider such world dull, gray, etc. But for me, it would bring some kind of new zen to urban life.
Ironically now, thanks to the Internet, advertisers themselves (and security agencies) are tracking our lifes in ways the STASI could not even dream of. The grass is always greener on the other side, but if you try hard enough you can always get the worst of both worlds.