Time stamp and set a reminder for 7-10 years from now for this comment: Tesla will be the biggest company in the world. See you in 7-10 years when you remember this comment.
The world? That's quite a tall order for a company with such a small product line. They would have to compete with companies like Exxon which have 250B in yearly revenue.
Google does not have 250B revenue. Far from it (50B a few years back).
Apple is in the top ten but then it sells billions of expensive phones. Amazon barely scrapes in the top fifty, while Walmart is number one (Costco,CVS and Kroger easily beating Amazon)
Being a "normal" bricks and mortar company does give more turnover power it seems. Globally.
Don't underestimate Amazon. They have the world's largest (?) server-infrastructure and logistic infrastructure in place. Most of the other companies rely on Amazon.
Could imagine that Google's infrastructure is bigger. Their cloud service is clearly smaller than AWS but they have much more computing demand than Amazon has for their main business. So overall Google could be ahead of Amazon.
Logistics infrastructure of Amazon is not the largest either. In the US, Fedex and UPS will have more infrastructure. Not that many warehouses, but when it comes to distributing items they should be larger. Worldwide, DHL Group could be the largest. They have a substantial freight forwarding business so that they will move far more goods every day than Amazon does.
The important thing, though, is that no one has both of it in one company. We'll see how valuable that turns out to be (maybe not at all, maybe very).
I don't think they will be, but I'm pretty sure various governments will want to start passing laws requiring electric cars somewhere around 2030.
The question is how they will take care of the already existing companies. Maybe Tesla will share more technology, so that the industry can transition as a whole.
Volvo announced a few days ago that all their cars will be either EVs or plug-in hybrids starting from 2019. Toyota is almost there today.
From an end-user perspective, it's pretty obvious that todays plug-in hybrids with 15-30 miles electric range and 600 miles range on fuel will be better than pure EVs. >90% of people's driving is within the electric range, but you can still have a car with a big enough trunk (Try fitting two baby strollers in a Tesla! Or a couple of downhill bikes plus kit. Or scuba gear for two. Or...) that can still get you from SoCal up to Lake Tahoe without wasting time on charging.
As for competition on pure electric: BMW, VW, Ford, Fiat, Kia, Chevrolet/Opel, Nissan, Renault, Peugeot, Mitsubishi, Mercedes - they all have "proper" pure electric cars on the market today that are seeing sales figures within an order of magnitude of Tesla.
(Note that being within an order of magnitude only requires that you sell 7000 EVs globally in a year, that's a pretty easy target.)
Didn't France just announce that they are going to require electric by 2040? I wouldn't be surprised either. We're at a much better point to use them and grow the infrastructure now.