The possibility to keep multiple sessions alive if they come from the same PC/Device. If just one of the sessions have activity, it would count across all open tabs from same PC/Device.

Userstory:

Users in a customer service department, who respond to phone calls with customers ordering multiple item lines. System upgraded from NAV and Windows Client. Here they would have multiple windows/clients/sessions open to have the client open "at the right place, at the right time" saving time from navigating the same client around. Going to SaaS users now have multiple tabs open. Users are often met with session timeout if one or more tabs have been out of focus for more than two hours.