The Surface Pro is entering its sixth year in existence, so it seems relevant for a "Surface Pro 6 model" to match. While the older numbering system for the name has returned, the hardware remains mostly the same as 2017's Surface Pro, now dubbed the Surface Pro "fifth gen" by Microsoft.
New CPU is substantially more powerful, Improved battery life; runs cooler, Black is awesome, Excellent build quality and design
No Type-C or Thunderbolt 3; No LTE option (yet); Odd pricing levels