At the moment if you want High Def telly on your PS3, you can use component cables or you can use an HDMI cable.
According to a memo allegedly sent to GameStop and obtained by Kotaku, the newest PS3 systems will disable high definition signals. In other words you will have to use an HDMI cable to show an HD image on the new 'K' model PS3. This is pretty much a sop to the stores which flog HDMI cables at a mark up that is so great that even Steve Jobs would not try it.
Most of the PS3 users probably would not know that it is a good idea to shop around for them. However the main reason is that an HDMI connection is a protected path to your television, complete with a form of DRM called High-Bandwidth Digital Content Protection, or HDCP for short. It means that Sony can control over how the image is used, while limiting the possibilities for recording or duplication.
So once again Sony is miffing its users by controlling them. It is fairly clear that user protests that turn in hacks don't make the slightest bit of difference and it is better go with another console.