Re: US$2,579.00
Very spendy alright, especially in light of the fact that a colleague picked up a Dell XPS 13 with very similar specs/performance (probably sports a few less ports) for under €1500 a few days ago. Yes, the X1 is probably all round a nicer laptop but not €1k nicer!
Some comments bemoan the lack of an Ethernet port, but this would impact on how thin the thing could be made, and I think a USB3 dongle is a perfectly acceptable compromise. When not on the road, it's reasonable to assume that a typical user of one of these will have access to a docking station anyway.