To call Apple's Thunderbolt Display long in the tooth would be an understatement. It's so old that the first Retina display Macs were still a year away when it was new, and it's now easy to get a 4K display for less. At last, though, it looks like Apple might be ready to give its standalone screen an upgrade... with an interesting twist, to boot. Sources for 9to5Mac understand that Apple is building a 5K display that includes its own graphics chipset. It'd be an odd move, but it would let many Macs use the display, not just high-end models. If your Mac's onboard graphics weren't fast enough, it'd automatically switch to the monitor's GPU.