Brilliant but slightly flawed. Toyota Prius is a fad, for celebrities to show off that they are concerned about environment. However, factually Toyota Prius is just as bad for environment as SUVs. Therefore, a better petrol or diesel engine for that matter would do lot less damage then Prius anyway. By the way I haven't seen any 'sensible car owner/driver' buying Prius for that matter
I wouldn't jump straight to calling the Prius a fad or to claiming as fact that hybrids are as bad for the environment as traditional engines.
Yes, there is a current fad for celebrities to appear eco-friendly and so hybrids are a quick status symbol. That aspect is a fad. However, the long term solution for the environment is one of mixed solutions. We won't have a truly clean fuel vehicle for a very long time, so in the meanwhile a mix of hybrids, electric vehicles and more efficient traditional gasoline vehicles will help during the transition.
As far as hybrids being just as bad (or worse) than traditional gasoline cars for the environment, that argument is usually based on a study relating to the production of the lithium ion and nickle cadmium batteries used in hybrid cars. That study was found to be very flawed. You can look it up on Snopes, as well as a number of scientific journals. Yes, lithium, nickle and cadmium are elements that through their mining and refinement processes are bad for the environment. Very bad in fact. However, you are talking about a 1 time damage to the environment in the mining and then refining process. The vehicle then produces less emissions and lower damage to the environment throughout it's product life cycle. In contrast a traditional vehicle make similar (though slightly lower) damage to the environment during it's production, no nickle or lithium, but plenty of iron and aluminum (almost as bad during mining and refining processes as the materials used in the batteries). But then during the products life cycle it will continue to do significant damage through it's consumption of gasoline (not just the C02 gasses it emits either, but also in oil pumping, and refining).
Look up that claim again and double check the sources.
As far as that all relates to the desktop though, small and compact is the way of the future. But lower cost, while still high powered machines will not just go away. I know I'd rather spend an hour sitting in front of a desktop than in front of a laptop. And I don't even want to have to do a full days work on my cell phone.