Polycarbonate isn't much of an innovation, and HTC's shape/color with their early designs was quite different from Nokia's. It's pretty clear to most observers that the design philosophy of the 8X is ripped from Nokia's line. It doesn't warrant any lawsuits or compensation (which Nokia is unfortunately pursuing), but the aping is very clear. I think the look of the 8S is just as good while being distinct, so I don't see why HTC felt such a direction for the 8X was necessary.
It's all meaningless anyway, like trying to claim brownie points for starting a fashion trend.
Again. Look at this phone
http://1.bp.blogspot.com/-aUPwYVUwYKg/Tb-6j9rA-rI/AAAAAAAAABI/dfy1rY9kXOU/s1600/htc-max-4g.jpg
And now look at the 8X
http://www.areamobile.de/assets/handies/htc/8x/htc-8x-und-htc-8s-hands-on-01.jpg
Its clear as day that its an evolution of a design they started years before Nokia. The curved glass and curved back design started long before the 8X. The only thing that makes it look like a copy is the colour choices. And i believe Paul Thurrot or Tom Warren (cant remember wich one) reported way before this that Microsoft specifically asked for those colours because they wanted the phones to stand out in stores. That deal was included in the partnership deal between HTC and MS for WP8
But again, this has gone off topic and its a pointless discussion since regarding HTC One and Apple, HTC already agreed to a cross licensing deal so there is no issue here