This is a GPU rather the a DSP (the tricky part is rendering not filtering). Core count is a bit of a pointless metric unless you know how big/ powerful a core is.
I like the idea of a self contained VR headset with no wires, but I don't think going to see on for ab a decade, there's just too much processing power needed for a realistic experience. I hope I'm wrong!
Edit: It appears this is in fact DSP (digital signal processor). That's a huge amount of power for dedicated signal processing, I'm intrigued to know what can be done with it.