Isn't that cart before the horse? The concept of investing is taking a risk. If you want to invest in only successful products after they're developed, there's no wealth delta to be a part of.
I think they're getting at a model either like Kickstarter, or directly funding a department ( say Google's AR department, if you liked their Glass idea ). The problem with a normal investment and no seats on the board is that you don't really have a say on direction provided that a company does more than one thing. there's also the fact that money is fungible and would probably just subsidise loss making departments as is common today
I would want to invest in projects that I think will take off. For example, if I had to invest in Tesla, I would not invest in the Cybertruck. In fact, that project turns me off investing in Tesla entirely. But say, the Model Y, on the other hand is something I think will be successful so I would bet on it
If you believe that Tesla as a company is a reasonable capital allocator, and that the Cybertruck will end up being a flop, then you should expect that investing in Tesla will mean investing in the successful segments (Model Y per your prediction) and quickly divesting from the unsuccessful ones (Cybertruck per your prediction).
The same goes for Apple and Airpods.
Tesla Cybertruck as it currently stands will flop in Europe, as the design is unsafe.