Anything that can be eaten by software will be eaten by sufficiently advance software eventually.
I can't think of any substantial value-adds from sales/marketing in the future to necessitate adding jobs there. High value (e.g. Apple) is currating a brand and most value is added at the top (average Genius salary looks around $45k [1]). Low value (e.g. Android OEMs) doesn't have the profit margins to support a larger human-sales/marketing team. And commodity (e.g. McDonald's) is high-level strategic branding with essentially no low level value add.
I can't think of any substantial value-adds from sales/marketing in the future to necessitate adding jobs there. High value (e.g. Apple) is currating a brand and most value is added at the top (average Genius salary looks around $45k [1]). Low value (e.g. Android OEMs) doesn't have the profit margins to support a larger human-sales/marketing team. And commodity (e.g. McDonald's) is high-level strategic branding with essentially no low level value add.
[1] https://www.glassdoor.com/Salary/Apple-Mac-Genius-Salaries-E...