That's still a fairly large screen with a very wide aspect ratio. (cnet.com)
It offers a 2880 x 1440 Quad HD + resolution for a pixel density of 564ppi, along with an ultra wide aspect ratio of 18:9 and HDR with support for Dolby Vision and HDR 10. (pocket-lint.com)
Both the Samsung Galaxy S9 and iPhone X have 5.8 - inch Super AMOLED screens with wide aspect ratios (18.5:9 in the case of the S9 and 19.5:9 in the case of the iPhone X), but they also have a lot of differences. (techradar.com)