You're right. solid-state drives are not reliable enough yet to fully replace hard drives. However, it is time to switch to 1.8" hard drives in notebooks.
I realize that 1920x1200 is optimistic in a 12" notebook. It is, however, what I want. Resolution Independence will make it practical.
It may not be a coincidence that the revised release date for Leopard coincides with the ship date for Penryn. We may see some Penryn-based Macs in time for the holiday buying season. I don't think Apple would let its competitors have a free ride through the holidays with Penryn-based products.
I wish my 12" PowerBook didn't have an optical drive. It is far too heavy. If I could run MacOS on a <1kg Sony VAIO, I would. I'll buy a new MBP when one is available that weighs less than my 12" PowerBook. Drop the optical drive and switch to 1.8" hard drives.
I want 2560x1600 in a monitor not larger than 24 inches. Anything about 18 to 24 inches would be fine. I have a 1600x1200 20 inch monitor now and I want substantially better resolution without substantially larger size.