The smartphone market is critical for Sony as it makes its way back to profitability in 2013. Sony sees smartphone unit sales growing at 50% in the year ending March 31, 2013, compared to a decline in unit sales of video camcorders of 9%, decline in digital compact cameras of 29%, and decline of televisions of 31%. The Sony-Ericsson joint venture was a world apart from the current Sony Mobile business. Sony Mobile executive vice president, Kaz Tajima, expressed his frustration that Sony was missing opportunities when working at the joint venture. Decisions came slowly as they had to be approved at different levels. Sony Mobile moves quickly on all decisionmaking. Companywide technological capabilities are also quickly available in designing a new product. The Experia Z uses all of Sony's technological capabilities in design, cameras, television and other areas. It now appears that the joint venture was the worst thing that happened to Sony. Sony bought out Ericsson's stake in the venture in 2011. Sony starts with global smartphone market share of about 4.5% and has a lot of catching up to do....