Back in the early days of the Xbox 360, one of the most requested peripherals was a VGA video adapter. In an effort to appeal to wide audiences with varying needs, Microsoft released just such an adapter not long after the Xbox had been out. About a year later they added support for the super-high resolutions (1920×1080) that were becoming more and more standard with current LCD displays. Many HDTV’s have a VGA input but do not support resolutions higher than 1080p, especially with older models.
What you may not know is that connecting your Xbox 360 to a LCD PC display like any of the new Dell monitors will give you a vastly better image than you are getting on your HDTV. Connecting the 360 to your monitor will unlock a host of resolutions all the way up to 1920×1080 (depending on your monitor) and the difference in image quality is stunning. Edges are smoother, colors are more vivid and textures have more depth. Everything seems to pop off the screen as opposed to blending together or appearing blurry and washed out. Small icons on mini-maps can be seen clearly and tiny text found in many games is actually legible.
The amount of improvement will vary depending on the type HDTV you may have. If you currently have your Xbox connected to an LCD HDTV you may not notice as significant of a difference as if you are using a rear projection type like DLP, but the fact remains that increasing your resolution from 1280×720 to 1920×1080 will be quite noticeable to all but the most vision impaired gamer.
If you have a computer monitor with a spare VGA input (or HDMI for that matter) I urge you to give it a test drive and see for yourself. You may not be able to go back to your HDTV.