“The biggest concern I have is that controls are designed for the 300px width, generally,” Ruter said. “So if the width is all of a sudden 900px, then the (custom) controls may well not look right."

- That's what I'm thinking.

Seems like it'll be a good add-in, but we also could be seeing developers throwing in more options solely because there's more space. Keeping things looking nice and from getting cluttered will be tough.