Apple should do something "radical". They should install an update to OS 9.2.X and OS 10.3.X and OS 10.4.X and OS 5.x to bring them ALL into 2012 to prove once and for all Apple hardware does not get obsolete and all computer users should switch immediately to Mac. This will not benefit them immediately, because some users with multiple machines for multiple personal purposes, do not need future media.
Even if there were possibly a business justification for wasting time on all those old OSes, most hardware that is limited to those OSes is old enough to be seriously unreliable, and not capable of dealing with modern storage, bandwidth, or processing requirements.
I guarantee a Power Mac 7100/66 running OS 9.2 or a B&W G3 running 10.3.8 is not going to handle iCloud well, even if you wrote an OS update.
Computers can be expected to last about five years, in both hardware and software. Once everyone accepts that as a fact of life, they will be much happier, and can more properly direct their ire at certain cheapo vendors (*coughHP*) who sell systems so underspec'd that a five-year lifespan is unrealistic.
*Note: I know many systems last longer, but that is a bonus, and we shouldn't count on it. I personally still have an eight-year-old PowerBook G4 in primary use. But I'm not upset that iCloud will obsolete it for good.