Wow, I haven't kept up on the past few pages, but there is some misinformation on this page.
Microsoft has made clear with their investment, and public statements, that they are very committed to having a strong presence in mobile. They know they can't compete with Android and iOS head-to-head now. We all know that. But MS will be an option. They know that unless they can get 30% plus of Americans or others in the world to use their phones, they won't get the same developer attention. That's why they're fighting for UWP apps, so they can use their W10 userbase to get mobile apps.
MS will continue to support these devices. I think, based on trends over the last year, the support will even be better than what past flagships received. Also, they did say that they're letting the distribution channels narrow for now, so they can push wider distribution in the future.
These are two of the last Nokia phones. After this, comes MS designs. Will they be mature, awesome designs like the Surface Pro 4, or more like the Surface Pro? We don't know right now. But I think we can guess that whatever Panos has coming will be pretty cool, and MS will throw a lot of weight behind it.