There have been rumors circulating over the last few months of a 'new Logic' but the truth is that Apple keeps things so under wraps that we will only find out once Apple release the new product.
Personally I don't think they have lost interest in Logic, I just think that they have alot on their plate right now. And also I don't want any new features, I would rather they address some of the bugs that are still present in the current form. Such as the System overloads messages that randomly come up when the system isn't overloading.
Logic is still a great DAW, sure some of the other DAWs are coming out with new versions with new features, but I still love Logic. I find it the easier DAW to work in when it comes to music production.