Antoine just about every NPA in Canada has a GPS overlay approach as well.
Many remote airports only have GPS approaches.
The RNAV (GPS ) approaches follow the T -standard illustrated in cl12pv2s post.
We still have a large number of NDB approaches. I suspect they won't be around 20 years from now.
Localizer Back-Course appoaches are being phased out-slowly.
The ILS approach- I think- will be around for quite some time; even though it is old technology it's still a fantatastic approach aid.