It’s been a long time since Apple introduced a truly new product. The world finally got one today in the form of the folding iPhone Duo, and while it's new for Apple, it's not new for the industry. Nonetheless, Apple is once again hoping to validate a mostly moribund market as it did with tablets and smartwatches – folding phones only made up 1.6% of total smartphone sales last year, according to Counterpoint Research. Apple announced the iPhone Duo – did no one check the list