Where are Google going with Dart? How will it impact on the web?
In days gone by, when Microsoft was the only real kid on the block, Internet Explorer made up the rules and ignored emerging standards in HTML. Then Firefox dared to challenge this, along with other browsers, and through the years Internet Explorer has finally made efforts to adhere closely to HTML & CSS standards.
So now Google comes along and will completely fragment the market again if others do not adopt Dart (assuming it is useful).
Imagine if we went back to the days when certain websites needed a specific browser. Please, NO!!!