I can see where a dedicated browser for development could be a little more helpful during the 80% phase of development. My main concern however is that some of

I can see where a dedicated browser for development could be a little more helpful during the 80% phase of development. My main concern however is that some of that remaining 20% is cross-platform stuff that you can't get right in a single browser. Unless they incorporate tiled views from different rendering engines. That would be awesome.