Love the concept of layers and I can see some uses for it even in its current blend mode.
Problem is,a good photoshopper rarely uses the normal setting for blending a layer.For instance,a good glass shine is screened...it gives a nice gradient...quite different from the same thing blended normally.
Another example is overlay or vivid blend modes...2 modes that look incredible inside PS,but unless merged properly before export look terrible as single layers.
Still,its great step forward...would have been awesome 1 or 2 years ago before the trend was aero glass,glass,glass.
Heres hoping textured WB's make a comeback.
Animated please wait sounds great.