BTW, it's nice to see how On1 can use layers on top of a raw file. I agree that it would be great if Lightroom could do that. From what I see on the On1 website, it looks like the layers will be rendered images however, not raw files too. Maybe you can tell us whether that observation is correct or not. If that observation is correct, then my answer would be "Photoshop can do better than that!". It's not that easy, and it takes a bit of extra effort if you want to do it from Lightroom, but Photoshop can layer images and keep the raw properties of all the images by stacking raw images as smart object layers.
So yes, I admit once again that it would be nice to have a single application that can do it all, but I'm not so certain that On1 offers superior results over the Lightroom/Photoshop combo from a technical point of view. Maybe it does, but I doubt it.