HTC One camera shooting in 16:9, what impact does this have?

Hi,

I've noticed in several reviews of the HTC One that they call out the fact that by default it shoots in 16:9 rather than 4:3, and some of the reviews recommend that users immediately change it to 4:3.

I understand that this means the camera is shooting in a wide angle aspect ratio, but what actual impact does this have on the photo taking and photography?

Are there any drawbacks to the 16:9 mode or is it best to leave it as it is?

Thanks