Tech review: A look back at the week's headlines

Apple and Google face competition from Amazon with the launch of its own internet-connected TV set-top box. Amazon Fire TV is already on sale in the US for $99 (£60).

Microsoft has unveiled a voice-controlled assistant called Cortana and Pixelbots are swarming to create images on tables and whiteboards.

BBC Click's Dan Simmons has more details of these and other technology stories of the week.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.