Sinofsky will appear at All Things Digital D9 conference. A source, familiar with Microsoft’s plans, has informed WinRumors that Microsoft is planning to demo its Windows 8 Tablet UI at D9. Microsoft has a habit of introducing new technologies at the Wall Street Journal’s D: All Things Digital Conference, which will run from May 31 to June 2 this year. Bill Gates introduced Microsoft’s Surface computer in 2007 and the company demonstrated Windows 7 multitouch in 2008. Microsoft will show a “technology preview” of its Windows 8 Tablet experience at the conference next week.