This isn't quite correct. BYD is also in a position to make a mass market EV by 2018. I think there's one other Chinese company which has an outside chance of doing so. The established international auto companies don't have a chance, however. Which means there is no *existential* threat to Tesla IMHO, because BYD will have delays getting approved internationally (and they're making a somewhat worse product anyway). But BYD could be selling 100K/year in China by 2018; this is a real possibility.
I stand corrected, though it will probably be a while before BYD is any kind of significant player outside of China. I believe they are focusing their efforts outside of China mostly in the commercial market. I could be wrong though.
Yes, other car companies are making noises but it hasn't been widely or repetitively reported yet. A US-based executive from Audi was recently quoted as saying he has been tasked with building at least 175 high-power DC chargers along highways Tesla-style before Audi's BEV comes out in 2018.
In addition, VW is signing a court-filed consent agreement requiring it to spend $200 million a year for 10 years on zero emission infrastructure and public education. A large fraction of that is expected to go towards purchasing, installing, and maintaining EV charging equipment. Of that money, $80 million a year will be spent in California where almost half of plugin cars are sold and where VW sells many of its US cars. The spending and infrastructure plans will be designed under the guidance of EPA and CARB.
That kind of money can buy a lot of DC charging locations. VW (of which Audi is a subdivision) is motivated to build a Supercharger-like network so they can compete with Tesla on long-range BEVs. These DC stations will also be usable by Owners of Bolt EVs and other non-VW CCS cars.
Note, that Tesla had no Supercharger sites when they first began selling the Model S in 2012.
I guess I missed that story. I know VW is planning their own Gigafactory, but they don't expect full production until 2025. From what I've seen the Audi and Porsche EVs are going to be very expensive. Possible competition for the PxxD S/X cars from Tesla, but probably ignored by even the mid-range S/X buyers.
VW is positioning themselves to draft on Tesla's success, but I expect they will be playing catch up for a long time. Hopefully VW's dealers will actually want to sell the EVs. When the shake up in the auto business comes, at least VW will be a couple of steps ahead of most of the rest of the ICE makers.