Should we have a new *widely used* image format?

[techu]

I like to use mostly PNG in my designs but it is not supported in IE so I have to add IE6 fix. But I do do use gif if the image is not so complex, so it saves me from adding it to the PNG fix for IE6......

I dont thing webp is going to take off anytime soon, more over in a world where IE6 is still being used, none of the web designer will risk using a new format that is not supported by most of the browsers specially the old once.