I don't think any manufacturer will be (or want to be) selling ICE cars in 2020, but it gives those manufacturers a mandate to push ahead with deprecating ICEs without scaring share holders.
That seems extremely optimistic, that is 29 months from now. I don't know how long development cycles are in the car industry, but I am pretty sure there are many engineers working on ICE cars to be released in 2020 right now.