Re: fragility of flat screen
Flat screen monitors are far more fragile than their predecessor CRT monitors. Basically, the new flat screens(or LCD) house tiny liquid crystals between two very thin sheets of plastic. Pressure on the screen of these monitors can damage either the crystals or the electric charge to them that enable the image. Cleaning should be done with a soft dry cloth with as little pressure applied as possible. You shouldn't tap or touch the screen at all.
Should you decide to touch the monitor, you will probably start seeing what's known as 'dead' pixels, which will show up as black and never show light.
If it's a new monitor, I suggest you read the user handbook/manual that came with it. They also usually come with a cleaning cloth with handling and care instructions.
On the other side of this coin, I personally love the new LCD monitors. Their enhanced color and image contrast are significant improvements over the CRTs.