I think the FAA offered TIS as an incentive for people to adopt Mode S.
Here in Europe, no "incentives" are needed - we have centuries of history of doing as we are told
But practically, even when everybody has Mode S, only a miniscule percentage of GA planes will have a means of displaying traffic info. You'd need a multifunction display, a compatible panel-mounted GPS with a screen big enough to be usable, an EHSI. All expensive stuff.