The only time I ever use my optical drive is to re/install OSs. I just couldn't bother trying to figure out how to boot from a USB drive or fiddling with boot sectors and boot loaders (or is it easy and I'm just being daft?).
That said, the optical drive is definitely dying, including CD, DVD and Blu-ray - on the way out. Magnetic drives will be the next to go, fairly soon, within the next 5 years or so. Flash memory FTW! Netbooks, tablets and smartphones have already done away with the slow, irritating, noisy, heavy, power hungry drives. Laptops and desktops will be the next to follow.
Do you guys remember a few years ago when Nokia shipped a phone with an internal magnetic mini hard drive??! Thank God it did not take off. Flash memory, the internet, wireless networks and ubiquitous app stores will soon be the order of the day. The future of computing is NOT in mechanical devices.
The future looks bright.