Are there any portable tvs that work well while in motion?
Do they all have to be stationary? Is there some type of adaptor that can be purchased to use a portable tv while in motion?
If you mean car or to take to a conference, for laptops and computers with USB output I know Lenovo makes a nice portable display. You could always buy a smaller 19" or so LED TV and get an adapter/converter to use in a car. If you plan to connect a game system then make sure your car battery is strong and you get a high powered converter to be safe.