15.4-inch MacBook Pro. (Credit: Apple) In October of last year, Dell upstaged the MacBook Pro 15 when it announced the redesignedXPS 15. Is it Apple's turn now? When it debuted, the 15.6-inch XPS 15 was stunning -- it was smaller, lighter, and boasted an almost-borderless Retina-beating 4K display compared to the MacBook [...]