For the home, you get more frames and better graphics responsiveness. For the business world, you get latency reduction on I/O, latency reduction on I/O, and latency reduction on I/O as the three most important things.
The Inquirer says this is a clear win for AMD, when it will come out.
If you were wondering what all those pins on S1207 were for, wonder no more. If you need I/O that scales with the number of CPUs, look no farther.
The AMD Athlon 64 already integrated the memory controller onto its chips and Intel will do the same soon.