This is pretty close, in that it should create a larger volume of vehicles all using the same form factor battery. Only one manufacturer not an industry standard though.
I don’t think most people were thinking swappable in the “do it at home or at a station instead of charging the car” scenario. More of a “these 10 vehicle models all use the same form factor and sold a substantial volume so there is a market to produce third party replacement parts that a mechanic could swap”.
More like a shared transmission or gas tank part that is used on multiple vehicles. Not something you swap often or at home. Something a mechanic would do and a replacement part is available because it was used in enough volume to create a secondary market.
Or, it might not matter. If the battery degrades slow enough that the rest of the car rots out and fails before the degradation is enough to matter. 
