[Brightcolours]

Now you are nit-picky ;-)


However, the upcoming Leica 50-200mm f/2.8-4 should be WAY below 1kg (and after that's a "400mm" lens). 

True, but then again, that lens has a smaller aperture again (f5.6-f8 equivalent). So naturally it can be less heavy. Less glass after all.

But yes, lighter than a Canon 70-200mm f4 + 2x TC too.

One good example of that if you choose carefully, MFT indeed can give a lighter set up with equivalent glass .