Dell had a 2560x1600 LCD in 2007. https://www.cnet.com/products/dell-ultrasharp-3007wfp/specs/ https://www.dell.com/downloads/emea/general/ultrasharp%20300...
Dell and Sony also had laptops going as high as 4K in 13" form factors around the same time. Yes they were high end. So too was the MBP.