46 MP FF is SWEET. Will make a lot of studio and product and landscape photogs happy. For the rest of us... well.... meh... it's of lot of pixels. 46.1 MP is precisely 18 MP APS-C scaled up to FF. So this would suggest Canon has improved the pixel performance (noise, iso, etc.) sufficiently that they are willing to deploy it in a 46 MP FF pro body? If so, then giddy up little pony and let's get to shootin'... the current 18MP APS-C are very good (not perfect, but they are good) so if there is any improvement at all then we all be lovin' it. It could also mean that Canon will keep the APS-C sensors at 18MP and similarly improve performance which is great.