One Login and one Desktop/App for all MS Products.
Integrate all MS products under one account. I can explain the idea in steps.
1) Login in to a UI(which is nothing but my MS page).
2) This shows all the MS products subscribed by me.
3) It also suggests/recommends any of the MS products that I can buy and make use of.
4) Now I need not have separate applications to be installed in my desktop, mobile or any other devices. This "One app for all MS products" should help me to login and open the MS products I need, say it be Teams or Outlook or anything else.