Yes. Photoshop.com, a web based application. Or, I guess the correct name is Photoshop Express. Maybe one of the bigger commercial attempts at making a web application act as desktop application.

While Adobe and Microsoft might make web versions of their software, nearly 100% off all existing desktop software will NOT be officially rewritten in HTML5. Some will get good HTML5 clones. More will get half completed amateur clones. With an ad banner.