Until 128GB micro-sd is avail and cheap (64GB is still the highest I've seen in retail stores), 2k screen is only useful for streaming 1440p videos which YouTube just only recently added. Expect an average of 4GB for movies or plenty of upscaling. Yet, not everyone has fully embraced Blu-ray yet or 4k TV's or whatever. People are still content on DVD resolution, HD cable channels, or FHD TV's. And watching upscaled HD videos from pre-2000's still doesn't look great. Grainy. Wasn't filmed in that higher resolution. Like digital zooming. Try comparing an early-1990's movie vs early-2000's movie both at 720p to know what I mean.
At this point it is like the Engadget review said owning a 2k screen smartphone. Owning one now is like owning an HDTV back in 2004.The content is just not here yet. Michael Fisher of PocketNow is correct. Spec stunt as of right now. It is no different than what Apple tried marketing 64-bit processor for the iPhone 5s without any real benefits from it today.
I would like all electronic manufacturers to focus more on battery life, powerful but way more efficient SoC chips, wireless charging, wireless headphones, lesser bezels, new form factors like foldable displays, louder speakers, more element resistance but with lesser flaps, better custom software, higher capacity memory cards, etc. Other dominoes need to fall first before we start seeing any actual benefits of 1440p or higher displays on 5-6 inch screens. Right now, 2k screen resolution should serve better with tablets at 7-inches or higher.