There are two issues [with the cloud]: One is energy. Sending information bits takes more energy than computing them, which means local computing consumes less energy. This is absolutely so fundamental that it will define the future of how our networks will be built. It implies that the cloud has to have a distributed architecture, because it will be too costly energy-wise for billions of people to be transmitting data. I’m not talking about the bandwidth problem — this is much more fundamental. Regardless of how much bandwidth you have in the dynamic user spectrum, you will still face this problem.
The second problem is sociological, which is privacy. People are much more positive about something physically close to them and physically in their possession because they feel like they have more control over it. You believe that if your personal metadata sits in the device, it’s better than to let it go away to some nameless server. So there will still be parts of metadata and bits of information sitting close to you for these sociological reasons.
Mashable interviews Henry Tirri, Head of Nokia Research