The optimal Smart-TV for me will be an TV with to slots to put in a standard Hardisk o SSD and a Standard-Bluray, OS where OSMC or Openelec and that the client have full access (maybe without support). Also like in the last years, the standards a changing continuosly please slots (for less 2) for the access moduls (Satelite, Kabel or terrestre).

Actual for example Sony TV has no Internet TV. Really is more Sony-TV why you connect with a Sony Server and this decide what you have access for. And obviusly they are monitoring you.
For this my TV only have access to looking for updates. All the rest make my Openelec-Mediacenter (R PI2 or Zotac Zbox ID-36 with Bluray 3D)