It's just marketing guff. A new OS release is an opportunity for Microsoft's "Hardware Partners" to flog boxes with certificates on to the unwary and ill-informed.
"Tuned" is usually no more than "we put a sticker on it". I very much doubt if that's changed.
(Yes trolls, shills et al, this is your opportunity to spread FUD about SecureBoot. Not that you need yet another one).