LCD + Basic cable ?
 

I will be upgrading soon but so far I only have basic cable.
Will I not get full advantage of LCD TV in terms of picture quality
if I only have basic cable? I heard that the quality of picture of
basic cable on LCD (with coaxial from the cable box going to the
back) can be equal or even worse than big tube TV, is that right?
How much improvement will I see in upgrading to digital cable?

Thank you.

LCD + Basic cable ?
 

Yes, that's true - because LCD screens are so "sharp" that artifacts on
the
screen become very prevalent.

Which is not entirely correct. Digital displays (non-CRT) will convert an
incoming analog signal to digital. That conversion may introduce artifacts.
How much or how badly the picture degrades will depend entirely on the
quality of the encoder inside the TV. Some of the cheaper LCD televisions
have real trouble here.

How much improvement will I see in upgrading to digital cable?

If you feed a digital signal from the cable box to the TV, not an analog
one, then you'd be getting the same signal as sent from the cable head-end.
This would avoid using the one built into the TV (not entirely, but mostly).

A little - best would be to get HDTV.

Not if there's not enough HD content available.

Best bet is if you're already using a cable box to use one with digital
outputs and feed that directly to the TV. If you're on analog cable then
you're at the mercy of the TV's encoder.