This week on What The Tech: Andrew Zarian and Paul Thurrott cover the launch of the Nokia Lumia 900 Windows Phone. Was the launch botched? Andrew and Paul discuss whether or not smartphones will eclipse point and shoot cameras in the near future. Does quality matter more than quantity? Andrew and Paul talk about app usage on Windows Phone. And Andrew and Paul discuss Facebook buying Instagram. What's their motive in buying Instagram? Also, are online shopping giants like Amazon killing brick and mortar stores?