John Moe, host of the Marketplace Tech Report, talked with Microsoft co-founder Paul Allen in our series of interviews with the business icon following the release of his new memoir, Idea Man. Allen discusses how the Microsoft of today compares with the Microsoft he helped build. He also talks about the challenges Microsoft faces in today's technology landscape, and where Microsoft fits in a world where cloud computing and smartphones are taking over the roles traditionally dominated by personal computers. Listen to the full interview below.