It is an impopular opinion, but switching to a desktop as a daily driver, if your work and lifestyle allows it, has many benefits such as greater power, upgradeability, compatibility (e.g. Linux, FreeBSD), repairability, and relative low cost.
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Laptops are portable. If you want something portable, it's gotta be a laptop.
sure, it depends on your use case, but a small bluetooth keyboard with a phone mount is probably more portable... something a bit like this: http://www.tuemarket.com/img/iphone-bluetooth-keyboard.jpg, or if you just need processing power, it could be a back pack server, etc...