What if, instead of launching business profiles (as they plan to), they make Google+ a network for individuals ONLY.
After all, most users are a bit jaded and burnt out... I don't want an online relationship with Chipotle, Sony, or Netflix.
If these companies want to promote their products to you and keep you informed, then great, but they'd have to do so using individuals.
For example, if Apple has a new MacBook, Steve Jobs would use his personal account to let you know about it. This creates a much more personal bond between brand and consumer, I'd think, and also allows for greater accountability.