Apple also announced the Snow Leopard Mac OS at the WWDC yesterday. Claimed as the most advanced operating system, Snow Leopard has been refined by more than 90 percent in around a thousand features present in Snow Leopard.
Snow Leopard is faster in many areas than Leopard, gives extra security because of the support of 64-bit architecture, out of the box Microsoft Exchange support and Apple trackpad integrated with VoiceControl features.
Snow Leopard will be available to Leopard users as an upgrade in September for just $29 and a family pack with five-user license for just $49. Tiger users get a somewhat expensive deal, a Mac Box set that includes the OS, iLife and iWork 09 for $169 and a family pack of the same for $229.