To reach its potential the most important single technology remains decentralisation. The average netizen should be able to serve and control his own data, even if he/she didn't create much of it in the first place.
I wouldn't want to live in a world where all real functionality moves to the Cloud and all our devices just become I/O thin clients. Saying that the average user won't care is frankly self-fulfilling and defeatist. How would they care if they are not provided alternatives to centralised services that are usable and compelling?