I'm all for more competition, but the analysts say Nokia is in more dire situation than RIM, and would hesitate before leaping into a Nokia.
http://www.bgr.com/2012/10/01/nokia-analysis-recovery-unlikely/
Also keep in mind....
-PC makers have typically struggled when introducing phones for whatever reason.
-Microsoft is coming out with their own smart phone. Why do they need Nokia?
If you really want a Windows phone, Samsung will be introducing one soon and it will likely be a very strong contender and feature packed like their Android phones.
IMHO, RIM indeed does have a fighting chance to claim "best of the rest" in the smart phone market after Apple and Google. They are already established, have 80 million subscribers, are still emerging in other markets and in some places have claimed the number 1 spot.
Nokia/Windows is starting from scratch, have poor app world, as Windows has only released developer tools to limited individuals. RIM is hosting sold out developer conferences all over the world and handing out dev models like crazy to get app developers on board BEFORE launch.
RIM still has an uphill battle to be sure, but no worse than Nokia.
All the best, and looking forward to 2013 to see how things pan out.