It replaces the similarly-sized 15-inch model. It's fast, it's light and – drumroll -- it has a new keyboard. This is a major USP for the device, given the unrelenting problems it's had over the last year. The new model features a new Magic Keyboard designed to address previous issues, plus the oft-requested physical Escape key.
With such a major launch so close to the holidays, it's pretty unlikely you're going to find one for a lower price this side of Christmas, which means it's going to be a popular deal and won't last long. Move quickly if you want to be one the first to own Apple's newest flagship tech.