Side Note: I'm glad the report of Leica Monochrom let me realized how RAW highlight recovery works digitally, which is no longer available in this Leica Monochrom sensors due to the missing colour filter. So it is a side effect that RAW can recover highlights in some extreme cases, with catches too.
For rich purists who want a specialised B+W digital camera. I guess it is just like shoe manufacturers differentiate leather-office-shoes, dancing shoes, jogging-running shoes, boating shoes (SperryTopsiders), street-walking-loafer shoes, lazy-man-shoes, etc... It is just a shoe, right?
When you want to say, "This is my B+W digital cam. The other camera in my bag is my colour digital cam."
Like in the past, when we used to load one cam with B+W film and another camera with colour film.
Cult of Mac says:
Quote [The difference is that the color filters have been removed. This does two things. First, more light gets to each pixel, as the red, green and blue filters are gone. This makes the sensor more sensitive, topping out at ISO 10,000 instead of ISO 2,500.
It also means that the images are sharper. With color sensors, the results from the variously filtered pixels are combined (or demosaiced) to make a color image. The Monochrome’s pixels are all the same color, so no demosaicing is necessary.] UnQuote