I'm afraid so. For season one there are no episode commentaries and worst of all no "Histories & Lore" segments either. Just two making-of featurettes.
(Click on the pic of the back cover to see the contents listing)
The Blu-ray special features were a great way to enhance a rewatch of GOT. Its a shame that WB are more interested in chasing streaming customers, than to keep up the tradition of creating all the fun extra stuff.
Looking at the amazon 4K DVD listing, this is now sadly confirmed.
Commentary tracks would have been fantastic for season one. For one thing Paddy Considine is a really funny guy down-to-earth guy in interviews. It would have been really good to hear him and the rest of the cast watch along and make irreverent comments. Just like the best commentary tracks for GOT.
So the Amazon US listing update and is now only showing a 4K steelbook option. Strong chance this listing is also a steelbook.
The Amazon US listing is now showing it as a steelbook as well.