Touché! (and slow optical drives)

Hypothetically though, if storate-drives were as fast as RAM is today, then you're right - getting data from them into the CPU is still a problem. Adding more threads excaserbates this problem.
However, this problem *can* be (and is being) solved through better software design without waiting for better hardware to arrive. Developers working the the PS3 have especially be burned by the cost of cache-misses (~800 ALU ops!) and are coming up with better ways of structing their code/data to deal with it. So, feeding 24 threads is hard, but not impossible.