You can buy a decent HDTV for £400 in the UK? You're comparing something with content to something with no content (in the UK). There are applications that benefit from dual core (including multi-tasking with two or more single threaded applications running simultaneously), there are games that benefit from SLI and the CPUs are not 64-bit, they're 32-bit with 64-bit extensions. There is no High Definition Television broadcast available in the UK yet. There are no DVDs, either. The only thing that could benefit from HDTV is an Xbox 360 - they're not hugely available at the moment either. All of the computer components that you've mentioned are widely available and there is content available to support them.