An awful lot of speculation about something that doesn't matter for most people. If you like smartphones and Nokia creates a killer high-end phone: good for you and Nokia. If not, than you simply buy a non-Nokia smartphone. I can't think of any other tech product that has so much alternatives and diversity.
The only people that should really care are the people employed at Nokia and the shareholders. I know there is something like "brand-loyalty", but I think that wanting a product just because it has the Nokia brand on it isn't a very smart thing to do.
Depending on your needs and wants I think Nokia currently has a number of very interesting products in their smartphone portfolio, mostly because they are notably different from Apple/Samsung/HTC etc. etc.