The 68060 is a 32-bit microprocessor from Motorola, and is the successor to the Motorola 68040. The 68060 is the highest performance 680x0 family processor available. It has 2 to 3 times the performance capability of the 68040.
The 68060 is probably the last development from Motorola in the high performacnce 680x0 series, abandoned in favour of their PowerPC chips. The 680x0 series is intended more for embedded systems, where it is already very popular. New developments here seem to integrate more peripheral functions on chip rather than increasing processing power.
For more information on the instruction set and architecture, see Motorola 68000.