This seems to be the expected result of SSD technology spreading and becoming cheaper. Your everyday user can now buy a reasonably-sized PC with only an SSD for storage. Additional storage needs can be easily addressed with memory sticks, external drives, and cheap and easy to configure and use network storage.
Optical is a bit of an odd one, but not totally unexpected. Online software delivery (no need for CDs/DVDs), downloadable music and movies, online and networked data storage, pretty much eliminate the need to burn a disc, and the lack of an out-of-the-box Blu Ray player in Windows probably puts the final nail in that coffin.