Not much we can add to this really is there? The HTC One is getting an update delivered as we speak, although as usual you might have to wait a little if you got your phone direct from a network.
Your phone should automatically check for this, however you can have a look right now by going to..
Settings > About > Software Updates > Check now
Of course, given the size of these updates we recommend using WiFi to get the update and we’d love to hear from you if you’ve received yours. What’s changed? What do you like or dislike?