Skeena and Seaford are sans serifs, each designed to mimic certain aspects of serifs. Bierstadt is Yet Another Helvetica Impostor™ (aka, a new typeface in the 'grotesque sans serif' category).
Tenorite appealed because it took an opposite approach from Calibri (round, wide, and crisp rather than soft corners and narrow proportions).
All five are sans serifs- shots fired at the legacy of Times New Roman-and the Microsoft Design Team made a case for each when unveiling these new options. As pictured above, the new potential default fonts are called Tenorite, Bierstadt, Skeena, Seaford, and Grandview.
