Pet 'emotion trackers' and intelligent jeans are here. But do we want them?

A pet collar that communicates whether a dog is happy or sad. A pair of jeans that gives directions. These are all real things that real people can supposedly really purchase one day,on show at this year's CES, the annual electronics show in Las Vegas. Almost all of the major electronics brands – Sony, Samsung, LG and like – are present at CES, but the real fun is exploring the smaller stalls. There are products for almost everything people could ever need.