A good thing in general...
Taking HERE away from Nokia's short attention span and putting it in the hands of an industry with a genuine interest in the product is, on the face of it a good thing. Of course, we'll see what the future holds...
Microsoft being only a licensee rather than an owner was also a good thing. It kept it from being subsumed into Bing Maps and also ensured a cross platform agnosticism in the longer term.
I do wonder how long it will last as a great, free product though.