The thing is that if Toyota wants to be a leader in this space, they should not wait for this to happen but be making it happen. The reality is that they have not been doing that. And others have.
If they wanted to be a leader in this space, five years ago would have been late to start putting in place the strategy, infrastructure, supply chains, etc. you need to build EVs. They did not do much five years ago other than insisting that they did not need to. And really, ten years ago would have been better, that's when Tesla started looking like a serious company and making concrete plans for scaling their business.
I don't see Toyota shipping EVs in volume any time soon. The new CEO is likely to have been tasked to actually start making this happen. But it's not going to happen overnight because they haven't built any factories yet, they haven't secured any battery supplies yet. They've built a few proof of concept / compliance cars that they are struggling to build in meaningful numbers and that they've had to withdraw from the market because of construction issues repeatedly. When they do start doing this, they'll have a little learning curve to master.
So, the new CEO has his work cut out.
As for being convinced about scale, the market volume is now millions of cars per year. Soon tens of millions. Tesla is a market leader with a target of getting to 2 million cars per year this year (up from 1 this year). And their cars are now the #1 best selling cars in many markets. They have really juicy margins on their products. It's a proven market with high margins and high volume at this point. Tesla is not alone in this market and there are quite a few other manufacturers also starting to move some serious volume. Any of those have what Toyota does not have: volume, scale, and proven products being sold as fast as they can be produced.
The technology is there. The infrastructure is there and rapidly expanding to keep up with supply and demand. New battery factories are being announced and opened all the time. We'll soon be measuring the collective output of these factories in twh per year rather than the hundreds of gwh per year it is right now.
Toyota if it wants in has a lot of catching up to do.