Well, the market is pretty much forcing that to happen already. Laptop hard drives are pretty much standard now. Every one I've worked on at work has interchangeable drives - at least as long as you stay with decent name-brand manufacturers.
Batteries are no where near the proprietary nightmare they used to be - again, assuming you stick with a reputable name-brand.
We're just beginning to see some CD-Rom standardization too.
Ram has always been a problem, and it would be nice to see more standardization there.
Peripherals are pretty much standardized - they're either PCMCIA or USB and will work on any system.
However there will always be some proprietary components in a laptop - can't be helped. In the battle for weight versus power there has to be some design trade-offs. A lot of the customization also deals with heat disipitation. Since there's no room for a true heatsink for the CPU - often the heat sink is incorporated into the design of the chassis of neighboring hardware. For instance, the hard drive chassis might act as a heat sink for the CPU.
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The Flying Penguin
http://TheFlyingPenguin.com
[This message has been edited by FlyingPenguin (edited 03-16-2000).]