Why we don’t use wider interfaces on wide screens

Screen are getting wider and wider. Almost every interface uses a fixed width and content is centered in the screen.

I know we can't read a too long line easily, but there are solutions to fill the extra space : columns, grid, ...

It looks like a huge waste of space.

Why it is not becoming a trend to produce wide interfaces, leaving the vertical interface for a horizontal? I only know a few websites that use wide interface.

Are there limitations? Why everybody stick to their 1000px wide website?