I wish the author commented on whether or not he can view text comfortably at 1:1 scaling. 27" seems pretty small for that resolution, probably borderline.

As soon as you start playing with scaling you begin to lose the real estate of the monitor. Sure, things will look smooth but I wouldn't want to drop $700 on a 4k monitor only to have to scale it. At 200% scaling you end up with identical real estate as a 1080p monitor.

In case anyone is wondering, Googling shows that this monitor is also SST which is a good thing. It means on the inside there's only 1 actual panel instead of 2 panels stitched together. A lot of 4k monitors still run MST (the worse alternative to SST).