Hi Greg
Re Samsung... and OLED technology in general.
Samsung entered the Smartphone business back in 2010 with their Galaxy range of Android phones... and these phones have always had AmOLED screens.
They have sold Millions of phones with this screen technology and continued its development to the point where
DisplayMate declared the Galaxy Note 4 to have the best screen available amongst all the various screen technologies out there... with similar results being achieved with their Tab S tablets.
Point is, that Samsung have FAR greater experience of making OLED screens than anyone... and supply many other companies as well... so it would be worth keeping them in mind for their OLED launch plans... I know they've demo'd OLED screens at several CES and other shows... I just don't know what their UK launch plans are yet.
The capability of powering each pixel On/Off, with no backlight being required, results in what was always the holy grail for even the Kuro [Black] range of Pioneer Plasmas... i.e. Black is truly Black... and as a result, other important aspects of screen performance are easier to "dial in", as allowances don't need to be made for backlight variances etc.
Good luck in your search