Perhaps little cores on a desktop could be dedicated to realtime / low latency stuff. But the overhead of having them available, even just conceptually, seems high. We've had CPU pinning and NUMA partitioning and shit for a while. They're not widely needed so it not a problem they're hard to use well.

Of course being Intel there's likely to be extra layers of insanity to prevent any interesting potential in the idea from ever being realized meaningfully.