I think people care about price and a consistant service. I would imagine that people assume they are getting the listed download speed, even though its got "upto" next to it. At the moment, speedwise we're probably slightly ahead of the game in terms of 'most' peoples needs.
Though more and more services are requiring more bandwidth so when the service they have bought starts to struggle, which could happen at any time as all connections are different, people are going to be demanding more. It's going to force people to be more tech savvy, especially when the kids today get to their 20s. This 'tech savvy' thing with be normal.
I'm not expecting a lot of people to buy the G.fast service as it is now because most people will already have a working 80 down 20 up connection. If they have no complaints why would they change technologies? G.fast would have made a bigger impact further away from the cabinet. I'm saying this so if the take-up isnt big then the argument that "people dont want the speed" is slightly nulled. I'm getting in before that comes up lol