It's true. But - and it's a big 'but' - it would have to be inaugurated as a Wales-wide policy, otherwise those areas that had it could lose out to those that didn't.
It's pretty much standard around the world, as well. Throughout the US and Canada, where you barely notice, as it's rolled into the cost of the room. What annoys in the US, however, is that prices are shown Ex-local tax, which in some places is 10%, so it can add a bit to your bill. But in general I favour a tourist tax, especially when we have a Tory government who don't understand modern economics, and like to keep us all in austerity.