Apple likes the All-In-One computer for various reasons. Although some claim the setup is easier I believe Apple likes it because it allows them to get the revenue on the built in monitor.
Why not give users clamoring for a headless computer a break. No I'm not saying ship a headless computer but design the iMac3 as a computer with an LCD monitor attached from the factory. The catch is this LCD would be removable with a wee bit of work. This has two nice effects.
1. Apple gets the revenue that they want.
2. Users aren't locked into an LCD. The iMac3 LCD would be DVI.
3. More flexible setup options. Some people like the look of just the LCD sitting on the desktop.
Yes I'm well aware that if Apple did this they would instantly hear "why can't you just ship it without the monitor?". Well the hell with that. I'm willing to compromise and as long as the iMac3 LCD is DVI selling that puppy is easy greasy on ebay. Therefore my ideal iMac would be as follows.
PowerPC G5 1.6Ghz
17" Widescreen LCD with built in speakers.
256MB RAM/120GB HD
AGP 8X upgradable graphics(Base 128MB)
Digital I/O, 10/100/1000
8X DVD-R burner
$1599
PowerPC G5 1.4Ghz
15" LCD with built in speakers
256MB RAM/ 80GB HD
AGP 8x upgradable graphic(Base 64MB)
Digital I/O, 10/100/1000
8X DVD Burner
$1299
Again a two piece design so that you have flexibilty in placement or you can swap out the LCD someday. Nice coverage between eMac at $799 and $999 segueing to iMac3 15" at $1299 and 17" at $1599. Now these systems would get peoples attention.