THIS. THIS. THIS. It's 100% legal not to mention brilliant to copy Apple's GOAL of creating elegant simplicity for users of their products. Most companies try to make hardware and software that is capable of doing things. Apple creates hardware and software that give users the ability to do things. The difference may sound tiny, but in reality, it's huge.
I'm sure these new ads will be effective. They're fine. The problem, if it's fair to call it a problem, is that the Get A Mac ads weren't just effective. They were iconic, and they changed the way other companies advertise products. They're still being mimicked today and will be for years to come. By comparison, these new ads are boring. But judged by themselves, they're probably quite effective.