The first at a large retailer perhaps, but small 3d printer companies have been around for years in the UK. Adrian Bowyer, who started the RepRap project at the University of Bath in the UK launched a printer company over a year ago: http://reprappro.com/

This is pretty cool. I think I'm going to build a RepRap though as it will be a few hundred £ cheaper.

this is a kit, so not fully assembled.