Define rule for visibility of a field

Hi experts,

at 26:01 of SAP Cloud for Customer - Planned February 2016 Release Briefing (ALT Version) video

SAP Cloud for Customer - Planned February 2016 Release Briefing (ALT Version) - YouTube

I see "define rule for visibility of a field" new functionality but I can't find them on my tenant.

There is any business configuration to activate this function?

Thanks,

Michele