wait wtf, this technology was around 10 years ago?
Yes, and longer. nVidia and others had support for this for quite some time. You used to be able to sync your glasses off the green/sync signal on the VGA cable. Then manufacturers started putting in little sync ports on the backs of the video cards.
Now that I know what monitor Im going to get I have a few questions about the 23 inch one. Will I be able to hook up my cable to it? I found my hdmi cable for my xbox 360 so I cant wait to play gears of war 2 in 1080P. Im playing it in 720P right now, although i doubt there will be much of a difference.
But what i really want to know is if I will be able to watch my cable TV on it with my cable box, not with a computer tv tuner.
First of all, the 23" Acer is HDCP compatible, so you should have no issues with HD content via the XBox or your cable box or a Blu-Ray player over the HDMI port.
Second, most games out now do not even support full 1080p resolutions. Most of them are at 720p (or less). Moving up to a 1080p monitor will allow you to enjoy that resolution on your PC games and on the XBox games that support it. Otherwise, yes, you won't notice a difference.
Edit: Also, the only way to make use of the HD is to use HDMI?
For media that requires HDCP, yes, only the HDIM (and perhaps the DVI) input will work for you. DVI is the pre-cursor to HDMI and will also display a digital "HD" signal. For that matter so will the VGA port, though it is an analog connection. Component RGB (also analog) for "high-definition" displays was out before either DVI or HDMI.