If Valve want the new Half-Life: Alyx to be a success, they need to push VR into every possible country they can and they're working a bit more towards that.
Announced early this morning (around 1AM UTC), the Valve Index is now being made available in Canada and Japan in addition to the availability in Europe and the USA. Half-Life: Alyx doesn't require the Index though, Valve did say it will work with any PC VR kit but this will probably give the best experience.
They confirmed again with this announcement, that all owners of the Valve Index will get a free copy of Half-Life: Alyx. However, it doesn't have to be the whole kit!
In their email they said "users who already own an Index or purchase the Index Kit, Index Headset/Controllers kit, just the Index Headset, or just the Index Controllers prior to the release of Half-Life: Alyx will receive a free copy of the game." which is a pretty sweet deal if you're looking for an upgrade somewhere.
You can find out more over on Steam.