How QHD(WQHD) large for Console works?

The WQHD offers ability to display all names of files in the /sbin folder on Linux!!! Extra blank space remaining too.

WQHD, more than Full HD but less than 4K

2560 x 1440, it is WQHD. Full HD is 1920 x 1080. 2K? 2K could be refered to WQHD also.

How about 4K?

3840 x 2160 is also in terms of 4K on AV system.

Any other non-common resolution?

Um… I think Surface Pro series uses 3K resolution is non-common but somehow also a stand… in the Microsoft Surface Pro universe. Surface Pro generation 4 to 7 delivers 2736×1824, where 3K should be 2880 × 1620 or 3200 × 1800.

Surface Pro 8 delivers 2880×1920. It should be very fun while working on Surface Pro 8 desktop environment.