HDMI connects digital audio / video sources like Blu-ray players, personal computers, video game consoles like
PS3 and other digital devices - to HDMI-enabled audio devices, television displays or digital computer monitors.

Because the digital video and audio data is uncompressed, HDMI can deliver the highest quality we can obtain.
The cabling is greatly simplified because the transfer is made on a single cable.

Some of the supported display resolutions are:

720p60
1080p60
2160p30

Also, the type B HDMI connectors and beyond, is already supporting high-resolution future digital displays like
WQUXGA - 3840×2400 pixels resolution.