It’s very possible, but the main question is how are you controlling the TV, because typically SmartThings is unaware of a/v equipment.
Some possibilities:
through a smart power strip that the TV plugs into, although not everyone likes to cut power to their TV this way ($60 or so depending on exact device chosen)
(edited to update after @tgauchat 's comment below that you could just monitor the TV power draw this way, not actually cut it off, which is much easier on the equipment.)
So this option will be the cheapest, although it may require some custom code to use the energy monitoring option. There are usually community members happy to help with this.
through the Harmony Home Hub universal remote. There is an official, although beta, ST and Harmony integration. ($99 to $150, depending on sale price) This will be easy to set up, but is more expensive than the power receptacle device.
through the global cache ITach IR controller (hardware). You still need a software bridge. Some people use HAM bridge, some use Roomie Remote. ($99 or so for the ITach, typically another $40 or less for the software piece)
This gives you the most versatility, but is the most complex and probably the most expensive option.
There may be other options depending on the exact model of TV.
@kevintierney has a related model television and @scottinpollock has done a lot with A/V equipment integration, one of them may have more thoughts.