Most of the HDTVs out come with component connections that are analog; and they do HDTV very well; they above comment is ridiculous.
Are you saying millions of people with HD don't have HD because they are using the analog component outs?
A VESA HD15 (VGA) connection will pass HDTV as well. HD Projectors with VGA HD out do just this.
http://www.ramelectronics.net/html/hdtv-cables.html#vgamm
Analog component video
Analog video signals must provide red, green and blue signals to create a television image. The simplest type, RGB, consists of the three discrete red, green and blue signals sent down three coaxial cables. There are a number of variant schemes which vary according to how synchronization is handled. If a synchronisation signal is sent on the green channel, it is called sync-on-green. Some schemes use a separate sync channel, for instance the European SCART connection scheme in which the video signal occupies four (R,G,B + sync) of the 21 pins in the interface. SVGA, another RGB scheme, is used worldwide for computer monitors (this is somethimes known as RGBHV, as the horizontal and vertical synchronisation pulses are sent on separate lines).
An alternative type of componentization does not use R,G,B components but rather a colorless component, termed luminance combined with one or more color-carrying components, termed chrominance, that give only color information. Mulitiple chrominance channels allow for more precision and speed in mapping the RGB colour space. This componentization scheme is a linear transformation of the sRGB color space. This type of signal is usually what is intended when people talk of component video today. Variants of this format include YUV, YCbCr, YPbPr and YIQ commonly used in video systems.
In component video systems, additional synchronization signals may need to be sent along with the images. The synchronization signals are commonly transmitted on one or two separate wires, or embedded in the blanking period of one or all of the components. In computing, the common standard is for two extra wires to carry the horizontal and vertical components ('separate syncs'), whereas in video applications it is more usual to embed the sync signal in the Y component ('sync on luminance').
S-Video is another type of component video signal, because the luminance and chrominance signals are transmitted on separate wires. This connection type, however, cannot produce high definition or digital-quality pictures (pictures with more than 480 interlaced lines of video for NTSC or more than 576 lines of interlaced video for PAL). Component video is capable of producing signals such as 480p, 720p, 1080i and 1080p, but digital connections such as DVI (video only) and HDMI (which can also include up to 8 channels of audio) give better results at the higher resolutions (up to 1080p).