[HardyLeung]

I think let's just agree that Jpeg has a lot of problems and we'd like to seek the best replacement. Obviously high-compression rate is important or else everything should migrate to PNG, but the current Jpeg tradeoff between quality and size is not just not very good. Also interestingly, there seems to be a very wide spectrum of Jpeg lib quality from decent to very bad, and I found out about that while experimenting with WebP.

WebP is different from WebM in that there are IP issues. I think WebP is more like SVG/Canvas in that vendors don't see any "hurt" in supporting them once there is enough momentum behind. Of course, your point about making sure that we don't want to support any half-baked image format. I think WebP is beyond half-baked, and an initial pledge of experimental support -- instead of an outright rejection which seems to be tone -- doesn't hurt.