Whats HDMI ?

HDMI stands for High Definition Multimedia Interface. It is the industry
standard for HD audio and video signals between HD capable devices. You
can connect your Playstation 3 to your HDTV with just one cable - and it
will carry both video and audio. All HDMI cables are digital. To do the
same thing with analog cables, you would have to connect 3 component
cables (red, blue, green) to carry the video signal and 6 analog audio
cables to carry the surround sound audio signal.

In addition to being more convenient, HDMI provides the best quality of
video since there are no analog to digital conversions as are required
with component or S-video - both analog connections. The difference is
especially noticeable at higher resolutions such as 1080p (Blu-ray and
Playstation 3 games). Digital video will thus be sharper than component.

HDMI has bandwidth capacity of up to 10.2Gbps - that's twice the
bandwidth currently needed to send a 1080p data signal from a Playstation 3.

HDMI works with faster 120Hz refresh rates of some LCD TVs.

HDMI is ready for 1440p resolution.