Some transitions stay contained within an industry. Others change the substrate everything else is built on, and the whole stack above reprices. This territory is about the second kind.
They are recognisable by their second-order effects. Energy production becomes the binding constraint on model training, so grid interconnection queues turn into an AI story. Settlement moves onto programmable rails, so treasury operations turn into a software category. Export controls make compute a sovereign asset, so supply chains turn into geopolitics. In each case the visible technology is downstream of a change in what is scarce.
Scarcity is the thing to follow. Leverage sits with whoever holds the constrained input while the rest of the system is still pricing the one that used to be constrained.