TV folded white linen would be better- I'm not a fan of showy squares with a suit, altho if the cut is informal I don't mind. With a white shirt, too, I'd go for linen- a better formality match. The other problem with the square is that it's not coherent with tie and jacket. The square is a bridge between the other elements: a final touch that seals the matrix. Needs to be darker, more subdued here. In general, I'd say that square is not very useful.