The Migration to Electric Vehicles in a Nutshell

I had a chat with a friend at lunch just now who asked me for a summary of the migration to electric transportation.  I tried to sum it up as follows:

We know pretty-much where we’re going and why we’re going there.  100 years from now, we won’t be driving gas-powered cars and trucks.  We can’t, for several reasons — peak oil chief among them.  I.e., we couldn’t find that much oil even if we weren’t concerned about the other enormous problems as well: national security, environmental damage, lung disease, etc. 

So I suppose you could say that we know where we’re heading (electric vehicles) — and why.  But we don’t really know when, how, or who.  In other words, we’re still trying to figure out:

When, i.e., how quickly, will all this happen?

How  will all the key issues (charging infrastructure, battery chemistry, etc.) work themselves out?

And, the question that underlies all the others: Who is going to make a buck in the process?  (Figure that last one out, and you’ll have a huge clue to the others.)