Article now updated
Yeah doesn't seem to be the case still on mine, so unless anyone else can confirm. HBO does have it in hdr with Atmos.
Sky is standard def upscaled with 5.1 in the UHD currently.
Plus bottom of the article still states:
"We also understand a 4K version with Dolby Atmos audio will arrive soon. So maybe wait for that, eh?"
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5.53pm - Yeah did little more digging
UHD/HDR versions are delayed - problems with the transfer from HBO to Sky meant they haven't been able to get them encoded yet.
Will hang on for the hdr atmos.