As he announced in April, PlayStation inventor Ken Kutaragi has officially left Sony. As planned, Kutaragi retired on June 19 as chairman and group chief executive of Sony Computer Entertainment. Kutaragi has already turned over his vision for PlayStation over the next two years to design teams. The future of the PlayStation was tied to the Internet and online gaming, he said. As to his future, Kutaragi said he would maintain an amicable relationship with Sony, but his future projects would be largely independent of the consumer electronics company. Since hitting the market seven months ago, PlayStation sales have been outpaced by Nintendo"s Wii and Microsoft"s Xbox 360.