I just purchased a new computer with Windows 7 and wanted an nice High-Definition screen to go along with it and settled upon the Acer T230H. I mostly wanted a fantastic screen for surfing the web, writing reports, and watching movies and frankly the touch was just a nice extra feature. It is an "Optical Touch Screen". In other words, it uses two infra-red sensors in the upper left and upper right hand corners to sense where your finger(s) (or any object actually) are on the screen.
The Touch-
It is not quite as accurate as the iPhone's touch screen but then again everything is bigger on a 23" screen lol. It does however work with the back of pencils, pens, corners of paper, tops of water bottles, actually just about any solid object can be used to interact with this touch screen. As far as I know, the iPhone can only respond to skin on screen interactions. The touch actions themselves on the T230H are very responsive with little effort at all. You can even bring your finger very close to the surface without touching the screen and the computer will respond to your position and click wherever your finger is about 1mm above the surface of the screen. I still find myself using the mouse often because I don't want to raise my arms for long periods of time. One area the touch has great potential is when viewing/editing photos. It is very helpful to just "flick" between photos and also to zoom and rotate photos. Using it to scroll on web pages is also fun and often easier than clicking on the bar or up/down arrows on the left of the browser.
This monitor comes with a screen that rotates on the base left or right, can be moved up and down, or angled up or down. It helps so you don't hurt your neck looking up or down depending upon your height and seating arrangement.
The screen is excellent, very clear, high-contrast, and of course is best used with High-Def (1080) resolution. The monitor has multiple settings such as "TEXT", "GRAPHICS", and "MOVIE". The "TEXT" setting is definitely easier on the eyes when reading for long periods.
I liked the screen enough to purchase again and now I have two Acer T230H's next to each other. Yes, with Windows 7 and a compatible graphics card you can have a dual High-Def touch monitors! You can drag windows from one screen onto the other and then "grab it" with your finger on the other screen and put it where you want.
After all my bragging here are some Cons:
1) Speakers suck. Volume barely loud enough to hear if you have any background noise whatsoever. Definitely need external computer speakers if planing to listen to music, watch movies, etc.
2) The optical touch system require extra thickness and hence the screen are not as thin as most high quality non-touch LCDs.
3) No LED backlight.
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Conclusion-
Overall I had no problems other than a stuck base that needed a good firm twist to loosen up so I could rotate the screen left-right at will. I strongly recommend this monitor to anyone who wants to "touch" the future of the computer for themselves and see in High-Definition.