There's been quite a bit of work done on the Flash Player to display and export JPEG-XR files. During the Flash CS6 prerelease, the Flash team talked about additional JPEG-XR support for things like spritesheet creation.
I know there's an ancient Photoshop plug-in for JPEG-XR, but does Adobe have any plans to make JPEG-XR a first-class citizen in Photoshop? Considering the numerous benefits the format offers, I'm puzzled as to why this hasn't been added.
Either way, it would be helpful to get the scoop. If there are no plans to support it then I'll buy a product that does, but I'd prefer Photoshop.