It's obviously not a universal truck that'll be useful everywhere. Where it will be useful is for inner city deliveries. Your typical inner city semi might travel 100-200 KM a day. They spend a lot of time unloading trailers where... your truck is typically turned off (and maybe in the future plugged in somewhere).

Obviously it's not going to replace every single truck on the road... but none of these automakers will. If every single automaker switched over to electric today, it would still take 30 days to replace every single diesel truck on the road.