Might want to chase through to the actual JAMA article.

Three methods of colectomy were studied: Open (traditional normal), Lathroscopic, and Robot assisted (not instead of).

Compared to Open, the robot was better in every measure except total hospital cost, where it was slightly higher (14,847 vs 13,666).

Lathroscopic costs less than either (11,996). At P>0.5, the differences other than cost weren’t significant. However the actual numbers are indicative:
In-hospital mortality - RC 0.0%, LC 0.7%
Complication rates - RC 14.7%, LC 18.5%
Ostomy rates - RC 3.0%, LC 5.1%
Conversions to open procedure - RC 5.7%, LC 9.9%
Routine discharge rates - RC 88.7%, LC 88.5%

If these indications continue then as the number of RC procedures increase they will become significant. And as the article you noted said, the costs will likely decrease as well.