And here is the Global Innovation Index for 2014
https://www.globalinnovationindex.org/content.aspx?page=data-analysis
UK #2, US #6.
Here is an example of a research impact study, in this case physics:
http://physicsworld.com/cws/article/news/2012/feb/21/uk-overtakes-us-in-research-impact
US is definitely #1 in the field of “making sleek objects seem very desirable”, even if an i-phone is functionally no better than a Samsung.