Random query: Will the PS4 have DSP?
Also can someone outline what a DSP in a console be used for besides processing audio separately from CPU in layman terms?
It depends on the technical details.
Because of their similarity, some people compared the SPUs in Cell to DSPs early this gen:
Major Nelson: "The Cell's seven DSPs (what Sony calls SPEs) have no cache, no direct access to memory, no branch predictor, and a different instruction set from the PS3's main CPU. They are not designed for or efficient at general purpose computing. DSPs are not appropriate for game programming." ^_^
When used properly, the SPUs could match the console GPUs of its era. So they are used for different stages of rendering in addition to security, physics, compression/decompression, video and audio decoding/encoding/processing, motion input, etc.
Traditional DSPs can still perform a lot of these things in piecemeal fashion, minus the rendering part (Modern GPUs should be more appropriate for end-to-end graphics work now).
EDIT: I just realized Wario was banned. What happened ?