Be sold on DVD but CDs will surely be available. M$ is not going to miss out on sales. Many people have only CD players on their laptops. I have a few computers but only one has a DVD player (burns too)
How many laptops that can't read DVD's won't be woefully unpowered in every other way imaginable? I think my laptop is about 3.5 years old, and it has a combo (CD-RW and DVD-R) drive. It's a nice machine, and I'll keep it as long as I can (it has REAL serial and parallel ports, and can boot DOS off floppy; some bit-bang apps work faster under DOS than under Windows) but I don't think it'd be much good for the new OS.