Quoting from other Forum I'm reading in relation to killing the power
"In the case of a digital television, you're talking about a power transformer inside the set that is really rated to handle those peak voltages, even at startup - but over time when you constantly subject a component to that spike it simply ages quicker.
The short answer is - no, you can't damage a digital TV by using a power strip to turn it off (especially if it's a high-quality surge protector), but yes it can age the set more quickly by putting the power components in the TV under a little more stress than they need to face."
"Electrical it's not advisable: You will certainly shorten the life of the power strip and or switch until it is damaged.
Whenever you intercept a circuit (using a switch or pulling the cord) an electric arc is created. Usually this arc exists only for a millisecond (or less)."
So basically, it won't spoil your set instantly, but it may cause some "degradation" to the power supply (the one that takes the 240v and convert to electric that your TV needs). It will be minor degradation but it will compile over time and in the long run it may cost problem.