There's a new article in Turkish from one of the most prominent (and close to Turkish) aviation authors in Turkey about the new seats on 787s and 350s:
Salon Salomanje - U?ur CEBEC?
The article has two images with the Turkish logos on them:
If you zoom in, you can also see the Turkish logo on the seats.
Looks interesting, but confirms that we're definitely not getting suites like in Qatar or Delta.
The article also mentions that there'll be special lighting called "Cappadocia Sunrise" which will provide better lighting.
Definitely a huge upgrade to the existing configuration. Hoping we get this to the existing 777s and 330s.