The problem is that they aren't going to be charging fractions of a cent per GB they are going to be charging much more.
When I'm stuck at school or work and am bored I find better ways to entertain myself, thinking, writing or drawing. I have had teachers that didn't care if I sat in the back of the class room coding on my laptop as long as I kept up and didn't disturb anyone else.
This might just be my lack of motivation but I find it very helpful to be forced to find someway to entertain myself, often in a positive manner, when not surrounded by the distractions of home.
Well actually I was talking more of Southern California as in below San Francisco, not LA, I hear Northern California gets weather occasionally. I'm on the "Central Coast" and there's lots of roads that would be uncovered most of the day but still ample sunlight. I imagine in the higher use areas there would be an issue of longevity as well as reduced light.
Most parts of the earth don't have massive dust storms and when it's not on mars we can clean them. The rovers were built for 90 day missions and they didn't feel a mechanism to clean the panels was important enough.
In Southern California we don't get much in the way of any real weather other than sun. In more rural areas where the roads aren't used that much, and if it's actually comparable to traditional road materials, it should stand up for several years. I'd say the real value is for rarely used roads in sunny locations; or where getting roads, data and electricity all in one is rather appealing.
Except for robots don't require sleep, or a place to live, or somewhere in the realm of 16+ years to become mostly useful, and I'm fairly certain that electricity is cheaper and easier to produce than the bevy of foods required to maintain a healthy human being.
A while back in a similar thread there was a link to a story about what happens when artificial intelligence can perform menial tasks, I thought it was quite profound.
It's a bit long but here it is: http://www.marshallbrain.com/manna1.htm
Also quite a lot of phones are free or cheap when signing your digital soul away for 2 years.
Street View still has fairly limited coverage compared to the world's streets.