The Natami is attempting to develop the 68k further with ColdFire additions and other improvements in a fpga for now. There is a lot of talented 68k assembly programmers helping with the project and some interesting reading...
http://www.natami.net/If you just look at the desktop then everything but x86 is dead but it may be that it's the desktop that is dying
. 68k (including ColdFire and Fido) are mostly used in embedded systems. The StarCore DSP has some similarities to 68k.
Most newer processors have been RISC but they need lots of memory. The more energy efficient RISC processors have come back to a CISC encoding with a RISC core. That's what the 68060 was 17 years ago. It makes more sense to start with a high code density CISC (68k) processor and make improvements than trying to turn a RISC processor with RISC encoding (e.g. ARM) into a RISC processor with CISC encoding. The 68k is much easier to program too. My point is that the 68k fell out of style rather than became completely outdated. That means a comeback is a possibility.