I haven't heard the terms spatial and temporal latency before. Maybe you're thinking of latency vs bandwidth?
Propagation delay does play a role in adding to memory latency but it's very small. Around 0.1ns per cm at most. The memory on PS4 shouldn't be more than a few cm away from the APU so I don't think it'll make a big difference.
Thank you. I don't think the terms are used much when referring to ICs but I have seen them on a few occassions.