bigdoubledee, these are new channels, but it may be easier to read if you click on the link to the MTS site. For example, Super Channel HD 3 & 4 are Premium channels that will be added to the Super Channel group. Right now Super Channel 3 & 4 are only in SD. You will have to subscribe to the Super Channel group at $17/month to get them, along with the rest of the channels in the group.
I haven't checked, but I think all the channels being added in HD already have SD versions.