Diesels are known for the tons of torque they can put out though, and in the US they're rare because many places have laws that make them hard to get or impossible (in CA it's damn near so) because of the stupid emissions standards (go figure)...
That outta the way, the reason Apple named the iBook G4 the "iBook G4" is because the iBook G3 was called the "iBook" and they wanted a way to differentiate between the two products.
The PowerBook branding has been around forever, as has the PowerMac branding, so they've
always had the G3/G4/G5 "tails" because again, it's a way to differentiate between older product lines.
The iMac, of course, follows the iBook's style -- the G3 iMac was called the 'iMac'. Let's not forget Apple also held part of the "Apple IBM Motorola" Alliance that created/shared the PowerPC (Power Performance Computing, not Power Personal Computing) *DONK* tech, so the G3/G4/G5 stuff was "theirs" to use anyway.
I'm just as interested as everyone else in what Apple will use to differentiate the new machines, something in me says that it won't be anything you guys are expecting though. It really could be anything, and it's ... kinda funny to speculate since there's a 99% chance we're wrong.
Will it say "iMacIntel"? No that'd be like Ford advertising the Mondeo as a MondeoMazda2.0T because it had a Mazda engine in it.
BTW, if I'm not mistaken centrino chipsets include the video chip. You're not going to see a Mac with chipset-carried video anytime soon (no matter how good it gets, the ideal "dedicated" chipset is going to be much better).
Ya know, it wouldn't be a bad bet to bet this one:
Mac Mini still gets called the Mac Mini
iMac G5 gets called the iMac again
iBook G4 gets called the iBook again.
It's rare I've ever seen an iMac G5 owner refer to their iMac as anything but an 'iMac' -- not "my iMac G5 is totally sweet" hehe.
In that case, you'd see the fact it had a certain kind of processor once you got to the product page, or the store's product page. Even then, my bets are you'd see something like this:
1.6GHz Pentium M
512MB DDR333 SDRAM
ATI Radeon 9600
64MB DDR video memory
80GB Ultra ATA hard drive
Combo drive (DVD/CD-RW)
DVI or VGA video output
Optional AirPort Extreme and Bluetooth
Built-in 56k Internal Modem
Blah blah blah.