As far as developers are concerned, the integration of Grand Central, OpenCL and a 64 bit kernel will allow you to take full advantage of the dual processing power of Intel Macs. If your Mac is operating at a slow pace, then for that reason alone it is worth the upgrade to OS X 10.6 Snow Leopard.
Record issues, launch remote support sessions from tickets, and keep track of your assets in one place. This version of Apple's OS also has a reduced footprint.
This update does not have stacks of new features, rather overall improvements and efficiency upgrades. Mac OS X 10.6.8 Snow Leopard is an upgrade to the previous version of OS X Leopard.