Power Strip/Extension Cord on TV stand
Most electrical equipment sold in the US, including power strips and surge protectors, are rated by Underwriters' Laboratories (UL) as being safe for normal use in residential settings. Power cords and stirps are intended to be placed on various surfaces without danger. If a power strip were tightly enclosed with no opportunity for ventilation, this might create an unsafe situation. Obviously, overloading a power strip or outlet is risky.

Your suggestion of placing a cord or power strip on a TV stand and using it to supply less than the rated amperage is well within the intended uses and should pose no risk. 

Extension cords and power strips are not intended to permamently replace properly located outlets. However, many power strip approved by UL include mounting holes on the back for attaching to walls or carts. If this is carefully done, is not likely to be damaged or too tightly enclosed and is not overloaded, it should pose no problem.

It is possible that local laws or building or lease rules may limit some uses.