Well maybe they'll have to have less, or keep them longer. Or we'll have to get better at prioritising energy consumption in manufacturing, and creating products that can be used for longer. Seems to me that there's no reason an ereader shouldn't last for 20 years or longer for example.
I definitely agree. Just wanted to point out how the personal computer energy challenge might have a larger scope than just laptops.
I just picked laptop as a convenient example, and because it might remind people that they probably have a house full of similar gadgets (and with a similar level of embodied energy).