Yup, it's not designed for use with a laptop, although you can use it with one and gain the benefits of better key feel, more optimal, efficient and ergonomic layout and optical trackpad mouse
and scrolling on independent thumbs.
It's designed to convert your phone / pad
INTO a mini laptop. So you don't need to carry your bulky laptop with you, just the keyboard, since you're most likely already carrying your phone. What is it that makes a laptop better for productivity? Primarily the interface, secondarily the software. Better interface = better productivity. So this gives you the productivity of a laptop with a lot less bulk AND better ergonomics (and the most common productivity apps are available on most phone systems nowadays). Also, since it will last through many generations of phone, you don't have to get used to new laptop keyboard layouts, switch types, etc for every new device you use. Just keep your familiar interface:
"When America’s cowboys were in the middle of a trip and their horse died, they would leave the horse there. But even if they were in the middle of a desert, they would take their saddle with them. The horse was a consumable good, but the saddle was an interface that their bodies had gotten used to. In the same vein, PCs are consumable goods, while keyboards are important interfaces." -Eiiti Wada
About the customisation vs using something that "just works"... Customising provides you with an experience perfectly tailored to you, that you cannot get from any "generic" system that's designed to be used by a broad range of people, no matter how "smart" it is. That's why I've made the character layout of my board fully programmable. An accountant will use it differently to a programmer.
Speed ≠ comfort. This thing hasn't been out long enough to get any kind of report on the long term effects of using it, but from what I know of anatomy and ultra-short travel (which doesn't give your body enough time to stop applying pressure, so you cause shock to the finger with each "press") you will likely find people complaining of finger and hand pain from using it soon, similar to that suffered by people who type on tablets. The fact is, a mechanical board simply is better ergonomically (and external keyboards are recommended fairly universally by health and ergonomics experts). Whether a mechanical is better than a rubber dome or other switch type depends very much on the particular switches being compared, though.
And how dare you call my "precious" fugly!
It's rather sentimental as I first learnt to program on one of those. It was far more "personal" to me than any other brand of Personal Computer around at that time, along with being portable.
Anyway, best of luck to you and I sincerely hope you (and al the other users of these) don't develop any finger / hand pain.