Fellowes 4800501 19.0-Inch Laptop/Flat Panel Privacy Filter

My TV is about to die, and I am thinking it might just be worth my while to replace my TV with a 20 inch flat monitor. Just making sure it can be done.
The way I am thinking, a TV in addition to the screen has a receiver to get the channels and an amplifier/speakers for sound.
But if i get my TV stations through a cable box, and amplify my sound thru an audio receiver, wouldn't it make sense that all I really need is the screen (the built in receiver and amplifier in a TV is superflous). In addition, I have the Miglia eye TV, compatible with my macbook, so I can get TV stations on my MacBook (it is an analog to digital converter)
I think it is a neat idea, and flat panel monitors cost less than flat screen TVs, plus I could use it for more stuff on my computer.
But before I go out and buy a 20+ in monitor, just want to check that it can be done.

Also is there a way to stream video (all video, including TV and DVD) wirelessly from my laptop to the monitor?

A: I actually do the same thing.
You just need to replace your video card with one that has a TV receiver. I use an ATI Radeon 7500 (Pretty old, actually).

I don't think the technology exists yet for a wireless monitor, but I bet someone somewhere is working on it!

Find and Fix Input Lag in Your HDTV or Monitor Washington Post

Input lag generally occurs in flat-screen LCD and plasma displays because the screen takes time to process the image in order to improve its quality. If you use your display or HDTV for doing general work, browsing the Web, or watching TV or movies, the lag is rarely significant; any delay is more likely to come from using a wireless keyboard and mouse and wireless Internet. On the other hand, if you use your display for anything that requires accurate timing (such as video, audio, or gaming), you may want to consider testing your setup for input lag.

There are several ways to measure input lag. One approach is to split the signal between a lagless CRT display and an LCD display (as demonstrated in this YouTube video ). Alternatively, you can use a Web-based reaction test like this one at HumanBenchmark.com , which tests your response to changing colors. Try it a few times, and if you notice a significant difference (30ms or so) between the results on different configurations, one of them is probably lagging.

Source: