The rise of tablets continues, certainly in the UK. eMarketer published new research yesterday claiming that more than 20m Brits will use a tablet this year, accounting for a third of the population. It expects this to grow to 34.8m people by 2017, which will be half the population and thus “a mass-market device”. The 20m figure covers people using tablets: i.e. not all those people will own one themselves, but will at least be sharing one with someone else in their household. eMarketer also claims that 59% of British tablet users will be on an iPad this year, but suggests that iPad’s growth over the next few years will be “a little over half that of tablets overall” as cheaper Android models grow fast. Talking of cheaper Android models… Tesco says it has sold more than 35k Hudl tablets since its £119 device went on sale last week. The device runs Android, and includes Tesco’s own Blinkbox-branded music service. 35k Hudls may be small beans in the context of 20m overall UK tablet users, but it’s a healthy start for Tesco.