TOS-R was a great job done, I have to say I would never watch anything but it now because the work done was so careful and appropriately done.
If TNG-R isn't going down that route (which I agree would probably be too expensive to do quality CGI for 179 episodes that matched the quality of the original effects - which mostly are not THAT bad in TNG as it was healthily resourced in that department) but just going for HD image quality based on the original effects then it becomes more doubtful I would spend on it.
But, really I'd still need to see a group of episodes properly.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist