Optical media is dying. Thumb drives and the like aren't there with cost per gig yet, but it's the future.
No, it's not. "The reports of optical media death are greatly exaggerated"
Retail packaged software will be on optical media for some time. Blu-ray and DVD movies aren't going away anytime soon either.
To completely kill optical media requires near-universal broadband penetration, which is still a ways off (latest stat I can find is 63% of US homes in Mar 09). Until then, the only way to get blu-ray quality movies to 100% of the population is, guess what, blu-ray.
I want a blu-ray drive so I can watch movies when I'm traveling. Every movie I buy is blu-ray (unless it's only out on DVD). I don't need a 1080p screen on my laptop, but I have no interest in trying to figure out how to rip and re-encode a blu-ray just so I can watch the movie on a plane.