Apple is also likely to make changes to Classic that will make it an OS X installable pkg rather than an OS installer. Also, those new Macs will come with restore-CDs that contain the Classic environment, so installing a new harddrive isn't a problem, really. Just restore the system from the restore CDs and you're fine.
Btw. Apple promised to continue to sell 1.25 GHz Dual PowerMacs that can boot OS 9, so you won't be able to get the higher end models (to be released after MWSF) booting into OS 9.
I personally hoped Apple would be clear to boot OS 9 off our harddrives earlier in the process, so we could move on. It happened for me, but that's because of my choice of software (and our company's, but I'm IT head there, so...). If we were XPress users back in 2001, I'm sure we'd have found a way to go InDesign by now. I'm also sure Adobe would have been quite helpful in the task.
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.