Woody, Fuji has a 60mm macro lens.
I'll let our friend Ken Rockwell describe it http://kenrockwell.com/fuji/x-mount-lenses/60mm-f24.htm
The X-Pro 1 has a macro mode available using any lens...
The MK3 is FF while the X-Pro 1 is 1.5 crop, so no, it's not going to give the same depth of field as a 1.2L on a MK3, but it will give a far sharper image @ F/1.4
I own both cameras and both lenses and if you don't believe me - go rent one
The Fuji can give the Leica M9 a good run for a 1/4 of the money.
It weighs a lot less than a 5D MK3 + 50mm 1.2 and more importantly, it doesn't make me stand out in a crowd, which in some of the neighborhoods I shoot on the street in San Francisco is very important.
Yes, we all know the X-Trans sensor is a bitch to program to so Lightroom doesn't support RAW for Fuji yet - it will be coming as the system finds wider adoption.
As many pros have found out, the out of camera JPGs are also excellent.
Personally, I only shoot in black and white.
I shoot RAW + JPG and PP RAW using Silver Efex Pro 2 using my JPG image as a reference.
For my needs, it works great and gives results every bit as good as the MK3.
Different tools for different needs.
The 5D MK3 is not a good tool for street photography.
The Fuji X series is.
Remember, I said "The fact that it can even come close
in image quality to the MK3 is staggering".