This chassis can take a mix of server and storage frames which slot in from the front and has a set of network nodes at the back, with a single master node. These nodes obviate the need for a separate top of rack networking switch.
This last statement is patently false though potentially irrelevant. Having a set of network nodes only precludes the need for external switching in the case of inter-node communication. Any communication with other, non-node infrastructure would still require an external access or aggregation switch of some kind. Where ToR is used, that would be ToR. Where end-of-row (EoR)/middle-of-row(MoR) switches are used, then those EoR/MoR switches would be used.
If the server nodes will operate completely self-contained, then the statement could be true. But I doubt it's true in the vast majority of deployment scenarios.