This is an acquisition that arguably puts Microsoft mobile capabilities above that of Google's, and closest to Apple's. They're getting industry veterans with great design talent. They're getting a Lumia product that has the best build quality of any non-Apple smart phone. They're acquiring proven channels to access global markets. Both Nokia and Microsoft have been floundering in the mobile space recently; neither have had any real explosive successes. Together they might make some really compelling offerings.
I'm not a fan of their mobile OS, but I am a huge fan of Nokia's latest smartphones, and if Nokia design's talent can figure out how to introduce a better UI, I'd seriously consider getting The Windows Phone as my next smartphone.