Okay I kinda get at where you're going with this. You were probably too cheap to spend extra $$ and now you are dissatisfied with the polycarbonate model. You have to personally "attack" the unibody, making it seem expensive and pointless in order to self-justify your polycarbonate MacBook. New computers will NOT use the DDR2 memory (at least the high end ones, not the low end Dells that cost like $300 dollars per box).
These are the facts:
This is funny. I was, in fact, too cheap to spend the extra $300 on the new body. And I for sure do not regret it one bit. I'm also not bashing the new body either, just pointing out why it was worthless for me.
People are really talking about future proof laptops? Really? Haven't we learned anything over the last 3 decades of having computers in our lives? You don't buy a computer for it's ability to be relevant in 2 years, because no matter how top of the line it is now. In 2 years it will be mid to low end. Whatever you upgrade the machine with, won't be needed in a new machine in 2 years. Upgrade the RAM now, your next machine will come with that standard, if not a better version. Same for HDD, a 500GB 7200RPM drive now will likely be below standard in 2 years in the higher end laptops. There is no such thing as future proof. Buy what you need now, that will last you however long you feel you need it to, because when you're ready to upgrade, every spec in your current machine will be outdated.
White vs. Aluminum specs? They are the exact same. Same proc., same video, same DVD, same everything. Except the ram. One has DDR2 and one has DDR3. Really, you will never notice the difference in real world day to day use. Step away from the benchmarks, they're meaningless. You're riding a spec sheet.
For the facts you posted,
Multi touch trackpad made of glass = $$ this ain't some 99 cent store stuff that EEE used early in their netbooks
I don't understand the awesome of glass here. It's a trackpad, nothing more. It's glass so the multitouch will work. I've never had a trackpad wear out, so material does not matter. Multitouch in the OS? I use a mouse, don't like trackpads, so I don't care. Personal pref. and nothing else.
Thinner, aluminum design = $$ NOT JUST FOR DURABILITY, it's a HEAT SINK too.
Again, personal preference. The plastic is durable enough for a computer. Has been for years. Also, I don't think Apple designed any part of the components to actually contact the body in any way that would allow it to act as a heat sink. Heat sinks are firmly attached to certain chips in the casing with thermal grease. In no way are they attached to the body. Sure, AL cools faster than plastic, but that's just the body and has little to no effect on the components inside.
LED backlit screen = $$ won't fade like CCFL backlights do, and is thinner + brighter + use less energy
CCFL does fade, but it takes time. Something like half brightness in 5 years. I have never used a computer past 2 years, so it's meaningless. Plus I keep mine about 4-6 notches down from max anyway. I can just raise it as I perceive it dims. Thinner lighter, uses less energy, yes. All nice pluses. Not worth the extra money for me.
LCD panel = $$ much much better than the older MB panels
Where do you get this? They're the same, one with CCFL backlight, one with LED. Apple uses more than one distributor for panels from what I understand. Some are better than others. I had two MacBooks once that sucked, couldn't display dithered colors at all. Took them back. I read about the same problems on the AL model as well.
Faster Ram = $$ this isn't the same as DDR2
Back to this? Again. Makes no difference here in the real world. You won't notice it surfing the web. You may, if you have them both sitting next to each other and can directly compare, notice a difference while compiling something over a long time frame. Again, not worth the price since I can just bump the RAM to 4GB for $35 and come out ahead of a stock AL model while still saving $265.
To end. Nobody is an idiot for buying either model. It's a personal thing. If the AL suits you, buy it, love it, use it. If the plastic model is good enough, save $300 and do the same thing the AL user does. It's a computer, nothing more. In two years or so you'll be doing this all over again with Apple's then weird lineup. Making arbitrary emotional choices based on price to new features is a part of using Apple products. At least this time, no one is having to justify $200 for nothing more than a color.