Exactly as Spuffy said... I watch TNG all the time, any time it's on, and I'll forever love it... This is just a new direction. There are, always, alternate realities in Star Trek. For instance, the mirror mirror universe which is in continuation into ST: DS9 for instance. It's gone on just as the ST:TNG universe carried on into the movies...
Likewise, the ALl Good Things universe (the future) carried on, but by Q's meddling, the ST:TNG timeline took a new route where Riker/Worf didn't have a fallout over Troi, and where Picard could maybe avoid his fate with his health due tot he early detection of it... Etc.
ST's copout of time travel, and alternative universes/realities, is bad to many, but to me it opens the ability for retelling the ST universe now somewhat, and going forward with a new series of movies at least.
Remember the multiple Enterprises in the one ST:TNG episode? Or Yesterday's Enterprise?
This is hardly a precedent setter.