I try to get out of my office and studio as often as possible, in order to help the creative juices continue to flow by experiencing new things. If I were using this phone and wanted to go to Starbucks to work for a day, I'd be required to bring a monitor, keyboard, and mouse with me. If that was the case, why wouldn't I just bring my laptop instead?
I'm not trying to piss anyone off or anything, I just find it genuinely funny how terrible of an idea this phone was. If you're going to be spending $750 on a cell phone, why not just spend a little more and buy a MacBook Air and dual boot?
I have yet to see this in any other device on the market; this alone would be sufficient for me.
So, while it won't be the best desktop PC you could get for this price, or the best smartphone you could get for this price (although for a smartphone, the specs are pretty good), you'd be getting both in one. I'm very curious to see how the integration between the two works out.
TL;DR: "Doesn't beat the best desktop" does not imply "underpowered."
http://www.websters-online-dictionary.org/definitions/Ubuntu