Zac, perhaps you could explicitly clarify in the OP that as well as Horizons, Elite Dangerous Season 1 will support Oculus Rift.
Since the Rift runtime 1.0 itself requires 64 bit Windows (Windows 7 SP1 64 bit or newer), Elite Dangerous Season 1 running on 32 bit Windows installs won't be able to use the Rift.
No idea whether 32 bit ED installs on 64 bit Windows installs will be able to run with the 64 bit Rift runtime, perhaps you could ask a windows engineer? It would appear to on be the list of Things Your Mother Told You Not To Do But You Did Anyway that QA people tend to think of.
Since the Rift runtime 1.0 itself requires 64 bit Windows (Windows 7 SP1 64 bit or newer), Elite Dangerous Season 1 running on 32 bit Windows installs won't be able to use the Rift.
No idea whether 32 bit ED installs on 64 bit Windows installs will be able to run with the 64 bit Rift runtime, perhaps you could ask a windows engineer? It would appear to on be the list of Things Your Mother Told You Not To Do But You Did Anyway that QA people tend to think of.