That's very interesting, thank you for the heads up Greg.
As for the 250mp camera...19,580 x 12,600 pixels with sensor size 28.7 x 19 mm that gives pixels 1.47 x 1.51 microns promising hopeless sensitivity and very shallow pixel wells...no thank you
EDIT: Canon specifies its 250mp sensor to be 29.2 x 20.2mm.