As I said before, I'm not sure the mere fact that DVDs and CDs are still produced and sold necessitates a corresponding drive in every laptop. Yes, for some reason, some people still buy DVDs (can't fathom why), but does that mean every laptop should feature an internal DVD-drive? Just a few years ago, the answer was clearly yes - DVDs were the way you watched movies, installed software and did backups. Today, you'll either get your movies online (legally or not) or on Blu-Ray. If you do still get them on DVD, you might not even want to watch them on your computer. Software, too, is mostly available online. For the few installation you will actually have to perform, an external drive would suffice (how often are you going to install Photoshop or OS X?). As for backups - please, nobody I know would backup their stuff on a DVD. Its capacity is way too low, and burning takes too much time. I haven't burned physical media ever since Time Machine became part of OS X. I'm not going to backup 125 gigs of music on DVDs.
I'll stick to my initial point: either update the optical drive to conform to current standards (Blu-Ray) or ditch it.
Don't get me wrong as I'm not disagreeing with your points but sometimes we have to look at the bigger picture where there's a huge fraction of the world's population who do not have the the internet speeds that alot of us are used to and simply cannot do large downloads at super speeds or have data caps on their tarrifs. Then there's also alot of people who simply don't trust online purchases too.
I also wouldn't do my backups over optical discs (especially over Blu-Ray) but in the business world, people still backup or archive their emails and other trivial files over DVD/CD and why would they not do it over Blu-Ray? Mainly because they don't have a blu-ray writer, blank blu-ray discs are more expensive, its less likely to be able to retrieve the data as Blu-Ray players are not ubiquitous.
At the end of the day, DVDs/CDs are still extensively used in business whether be it a photographer distributing school photos, a media company who can only distribute their material by optical media for legal/contractual reasons or do not have the capacity to accommodate some technical luxuries we are aware of, etc. etc.
But back to my point, are DVDs/CDs obsolete?... no.
As for Apple getting rid of the optical drive? Here's my copy/paste from another thread:
I can't see Apple getting rid of the SuperDrive for at least the next couple of years simply because there are still plenty of people out there who use it more regularly than others and from a marketing point of view, the case for them to remove it just isn't strong enough yet. Until the competition catches up with them, say on battery life, I think Apple would then strongly consider removing the internal drive.
Not trying to get in a "should they/shouldn't they" discussion but I just see it as Apple are in a "damned if they do, damned if they don't" over this issue.
Personally, I do use the drive and find it very convenient having it internally but I could easily live with it being external. Having the SuperDrive is a cheap solution to filling the gap in the MBP and filling the space with something 'more' useful would increase the overall price of the MBP or cut into Apple's margins (which I can't see happening). Saying that, I use it more than my firewire port but this doesn't mean that they should get rid of this port either.