Indeed, Apple posted the following sentence on its site shortly after Steve Job's keynote:
"From G3 to Xeon, from MacBook to Xserve, there is just one Leopard."It has since been changed to:
"And in just one great package: Leopard."In addition, the README of the version which was distributed to developers at WWDC states that the minimal system required is a G4.
Lastly, although some developers could get it to start on the G3, if Leopard was installed on a disk using a G4 or G5, the results are not impressive.
Of course, all that is subject to change. It will depend on the remaining G3 installed base, the effort required by Apple to maintain compatibility with the G3... and on the goodwill of Apple's executives who would prefer that people purchase new Macs, which is perfectly acceptable for machines that are greater than 4 years old... So don't hold your breath...
JCJ
