Proper Shadow//Reflection Catcher

Are there any plans to include proper shadow/reflection catcher pass implementation in future Cycles versions? Current Shadow Catcher pass produces more or less acceptable result, but there is simply no way to have a reflection pass with alpha.

Let's say we would need to have a pass with this bottle shadow and reflection, but without table surface for compositing. This is currently impossible, or requires a lot of extra steps which still do not produce accurate result.