One of the main attractions of our better-equipped T570 model is surely the built-in UHD IPS display (3840x2160). Among other things, this is also because Lenovo's other display options are semi-great at most. As customary for business laptops, there is an HD TN option (1366x768), which the buyers should definitely avoid. The display option that is built into most of the T570 units is the Full HD IPS (1920x1080) display, which we evaluated in our first test. That display was not quite able to convince us: Although, as is typical for IPS displays, the viewing angles and the contrast are good, the comparatively low brightness of 245 cd/m² and the very low color space coverage left much to be desired. We already knew that from the predecessor, the T560. The old curse that business devices have displays that are rather below average, has not been completely overcome yet.

On the basis of the measurements of the 4K/UHD display, we can say with a clear conscience that at least in the most expensive display option, Lenovo has done almost everything right. It was also true in the T560, whose 3K IPS display option (2880x1620) is replaced by the 4K display (the T570 is the first ThinkPad of the T-series with a 4K display ever). Just the display brightness is reason enough to reach for the expensive display option. At 314 cd/m² on average, the built-in panel coming from BOE is considerably brighter than the Full HD display. With this, the 4K display does almost as well as the 3K display in the predecessor: a good result, even if the displays in the Dell XPS 15 and especially in the Apple MacBook Pro 15 are again much brighter than that. As with the 3K predecessor, the 4K panel has some PWM, although it is with a much higher frequency of 925 Hz, which should give no cause for concern to most users. The display hardly shows any backlight bleeding; only during bootup it can be seen minimally on the bottom edge. At 89% the brightness distribution is good, but not outstanding. Shadowing cannot be seen with the naked eye.