Hi all, someone has managed to hack the Samsung Galaxy S3's S-Voice feature so that it can work on the HTC One X. You may need to download an app first called 'Astro' and switch on the setting to allow installing of apps from an unknown source.
The link to the app is: svoice-signed.apk
I have downloaded it and currently using it. Quite a kool feature to have on the One X. Also, my phone is not currently rooted so no need for a rooted phone to use this app.