I agree it is interesting. I primary shoot people and love wide angle photography. My longest focal length is 70-200mm, so I have been looking out for an affordable telezoom.
I've been quite pleased with my new generation Tamron zooms (24-70mm f/2.8 VC and 70-200mm f/2.8 VC) so hope that this 150-600mm will provide similar level of image quality. My only concern is AF-compatibility with future bodies like the much rumored 7D-II.
Eos: 1Ds-III, 5D-III, 6D, 60D | Canon EF: TSE-24L-II, 16-35L-II, 24L-II, 35L, 40STM, 100f/2.8, 135L | Wishlist: TSE-17L, 200f/2L
Tamron: 24-70VC, 70-200VC, 150-600VC | Samyang: 8mm-T3.8, 14mm-T3.1
Crazy Ideas: TSE-90L-II, 40f/1, 100f/1.4, 35-85f/2, 100-300f/4_1.4xInt, 500f/5.6_1.4xInt