Extended desktop for iMac G5's

This is a long shot, I know, but I just have to write about it. As we all know the new Intel based iMacs support monitor spanning (so you can extend your desktop across two monitors) as opposed to video mirroring only as the line of iMac G5's did. The latest iMac G5 and the new Intel iMacs have almost identical hardware (other than, you know, the processors), so my question is: do you think Apple will release a firmware update that will allow older iMacs to monitor span?

I know there are hacks that allow this, but I would feel a little more comfortable using official Apple software, no matter how unlikely it is.

What do you say, Steve? Could you do us iMac G5 owners a solid? Thanks.

Update: This is why I love our reader! This post has been up for less than 10 minutes and people have already pointed out that I forgot that the Intel iMacs sport a new video card, which I did forgot to factor in. However, it is clear that the video cards in the iMac G5's support extended desktop, the firmware 'cripples' that feature. Heal my iMac, Apple!