,Harlequin wrote

But is this Bing thing a "Windows 8 App"....or is it an "HTML5" app that can be used on all kids of tablets who have modern browsers? If it's a Windows 8/IE10 thing, then are we not back to the IE6 days of coding for a specific browser?

well given the webkit extensions for iPhones and such i'd say we never left .... just new sets ofCR@P / Er wonderfull features to deal with!

really HTML and CSS are never going to render the same on all browsers.... so if you want to make s site great for every client you ither just do the basic site and stop or you make like 10 versions of it.