Are you thinking of wall mounting your TV?
One question I get asked regularly is what height should the TV be?
It is a matter of taste however to avoid neck aches it is good to have the centre of the screen at about head height.
Then weigh that up against aesthetics and practicality. Part of the practicality is if the wall has sufficient strength?
Can the cables be hidden in the wall? Do you need a bracket with an arm extension so you can twist the TV so it can be watched from an angle?
If you have a steel framed house there may not be enough steel thickness for screws to get a proper hold.
These are just some points to consider.