Bloomberg a financial software, data and media company pledged $80,000 for the Enterprise 100 including 100 Ubuntu Edge devices, workshops and support by Canonical, bringing Ubuntu for Android into the workplace.
A short answer
Because you like to have a mobile phone that is also a Desktop PC or a Tablet, depending on the screen attached to the device, and the OS and Apps seamlessly switch between those modes.
Already convinced, then go for it: http://igg.me/at/ubuntuedge/x/4078192
Do not wait, because the phone is not intended to go into mass production after the initial run.