The OP was an opus but it was more of a waking dream. It is not a binary decision. It is not Tesla versus the world. It is Tesla "within" the rest of the world. The most pro-Tesla folks see a world that does not include other automakers.
About 10 different auto companies are involved in EV design and rollout. Carlos Ghosn at Nissan is pro-EV and is the leading EV salesman in the world. He also is aspiring to do the millions of sales that Tesla wants to. GM is kind of "krapping" the bed lately and not really moving forward until their battery labs certify the next-gen battery for the next-gen cars (due 2016 at a minimum). They already have an electric Cruze running in Korea but don't bring it to the USA to due platforming. Ford is moving forward slowly but they have huge capability. Mitsubishi is doing some nice things with the PiHV outlander. Volvo is stepping up with CrossBlue.
Let's all get along and understand that when the world electrifies - all the automakers will be making electric cars. Cost of scale, and channels will rule the prices customers pay for them. All incentives will be gone because now incentives will need to go to electric companies to beef up delivery mechanisms, establish fast-charging sites and grow the infrastructure. In fact, I think money is better spent on beefing up electric companies to support EVs (more deployment of inexpensive charging sites, more locations on major and minor routes, etc.) Sure we want people to buy them. But we need to make sure all of our governments, electric companies and consumers want to support it.
Tesla will grow but I doubt they become "Le géant mondial". They have a head start but there are some massive firms out there also working on their solutions. They will all get along as long as the battery tech can be brought down in price. The current sales model supports most of the heavy-incentivized countries. It needs to make sub $20K cars for the mass populations of the world (BRIC) and Asia. The USA is only 4% of world population and the growth economies are not here. What I think we have here is viewing Tesla as "the replacement auto technology all other auto companies will fail because-of". That is not going to happen.
One stumbling factor. The time it takes to make one battery (ie. the machines needed to fill, wrap, complete, charge, package and ship) is far larger in time than to refine some oil into gasoline. The time needs to be exploded out into a number of cells needed per car, per day, per year, etc. The Gigafactory idea of 200 of them are needed to replace all cars is a 50-100 year thought. You then need 10-20 battery recycling gigaplants to bring in those used cells and recycle them. If such recycling happens within the Gigafactory - what is the ongoing cost of recycling one cell added onto the production costs of one cell? Is it sustainable? Has a full lifecycle review of this been done in its entirety?
Many EV enthusiasts read Science Fiction. I actually don't but have a knack for gardening. It will be far better to look at ways to reduce our needs to drive (telecommuting, less "bread-and-circuses", less shopping trips) than to try to find ways to just transition the cars over. More mass transit, more busing services (electric) and more getting-along with strangers will do far more good for humanity than everyone trying to exist in their own electric bubbles.
Let's move to EVs but let's also support all EV manufacturers. It is far more important to grow the full spectrum of the EV marketplace (the whole) than to be staring at how Tesla can rule the world so our stock can go up (the me). Autos are not free-software (Google) and don't have massive ad-revenue incomes to offset costs. Autos are not Apple (priced a few hundred higher than others). They are hugely substantial purchases akin to buying a house. They [EVs] should not be treated as if everyone will just buy them because of some "tech" reason.
