BootDaily has posted an interesting review that shows us what 8 cores in a single machine can really do. Here's an excerpt:

It would appear that Intel's X5365 XEON processors are indeed the fastest thing out for your money right now - it completely dwarfs the Core2Duo in the overwhelming majority of the benchmarks used here. Undoubtably, there are many scenarios - single threaded applications for example - where the performance delta between the two is minimal. However, the focus of this CPU is the workstation class market. Keep in mind that games coming out now and even more so in the future which have multi-CPU support out of the box; so gamers should pay attention to this growing trend of more cores. This year should prove to be most interesting in respect to the amount of CPU cores we see get rolled out and in regards to the amount of available software supporting the trend.

For now, it seems, that majority of the workload to be fully appreciated by 8 cores is left primarily in the workstation/server environments. The day is coming, however, when the lines of needing more cores for home or the professional environment is blurring and the X5365 provides a great glimpse of what's possible for desktop users down the road.