Online sales are still growing in the UK — but sales from desktop computers are not.
Rather, tablets and smartphones are responsible for the 15% increase in online sales UK retailers saw in the first half of the year, according to data from Interactive Media in Retail Group (IMRG) and Capgemini (via eMarketer). Tablets — which account for most (85%) of mobile sales — grew 130%, while smartphone sales jumped 210% year-over-year.

According to IMRG and Capgemini's estimates, tablets and smartphones now account for nearly a quarter (23.2%) of total online sales in the UK.
SEE ALSO: Mobile to Account for 25% of U.S. Online Sales by 2017
Where the UK goes, the U.S. is likely to follow — though it will take some time. In the U.S., mobile devices are expected to facilitate a smaller portion (15%) of online sales this year. While sales on tablets and smartphones are growing rapidly — up 82% between 2012 and 2011 — they don't yet make up enough of the ecommerce pie to take full responsibility for growth just yet.
Images: ROBYN BECK/Getty Images and eMarketer