you just have to open any HTML file for understand how HORRIBLE it can be mixing content and code in the most attrocious way ever. i dont even talk about the total no man's land of good working tool. we dont even have a working intellisense at the level of .NET for C++ . so i have really NO HOPE for anything like that for JS/HTML5! for me intellisense and .NET 3.0/4.0 was the best programing experience i ever had! i even abandonned my groovy/netbeans for switching to full time vs2010/blend4 experience i love it EVERY DAY! i even started to praise for microsoft with love specially being a MSFT system internals certified and knowing the plateform better ( im a old linux/C coder ).