The Microsoft Surface Mini was really in the works behind the Microsoft curtain. Microsoft admitted to the abandonment of the device in its quarterly earnings report which showed that profits for Microsoft actually slumped. In the release of the report one factor of the slumped profits were said to be due to “Surface inventory adjustments”. This adjustment was said to be “a decision to not ship a new form factor” which pretty much clearly describes the Microsoft Surface Mini.
So indeed the “small” gathering set a few months ago was to release the Microsoft Surface Mini to combat all the other small form factor tablets in the market. In fact in the included manual of the Microsoft Surface Pro 3 there was suggestions of the Mini moniker. Ultimately then the tablet was cancelled and no one knows why.
Source: Microsoft Financial Report