Although business apps, that are useful, are thin on the ground and getting even skinnier. Slashgear reports that a number of large companies have been quietly dropping watchOS support from their apps. Google, Amazon, Target and eBay have done that.
So, while the number of health and fitness apps seems to be growing - the inclusion of an integrated GPS/GLONASS receiver and waterproofing gave that sector a massive boost - enterprise and other business apps seem to be waning.
Once you get past calendar apps and notifications the number of business functions you can actually execute on the Apple Watch are quite limited.