So there was an interview with Vanity Fair from the end of July that stated that the finale (future scenes) would be addressed, but almost in a way as if they were in the same timeline, but maybe with some minor altercations or a creative way to use the finale back onto the revival. I have not yet seen an article that states that the whole thing is a full-fledged reboot and I would think if it were, they wouldn't care about addressing the finale in any capacity--I would think they would ignore it.
When asked to address any head-scratching fans, Kohan jokingly told E!
News, “Keep scratching.” Mutchnick, however, was more forthcoming: “I
would say this,” he offered. “We’ve just come out of a story camp that
lasted about three months. That’s where we break and write all of the
episodes that we will be filming in August or whenever we start. I
will tell you that almost more than anything, more time went into
figuring out how are we going to reintroduce the show and what were
the rules going to be and how were we going to address that finale . .
. And we can tell you this much: They are very much living in that
apartment in 2017 in the month of September, on the 28th of September
at 9:00. That’s when you’re going to meet up with them again, and they
are going to explain to you exactly what happened, so you know the
rules moving forward and you won’t feel like anything is left open.”https://www.vanityfair.com/hollywood/2017/06/will-and-grace-revival-series-finale
Then there is this a few days later from EW...
~~~~~~~~WARNING - MORE SPOILERS in EW Article!!~~~~~~~~
“When the decision was made to bring the series back, we were like,
well, we left them with kids, right?” adds executive producer/creator
David Kohan. “And if they have children, then it has to be about them
being parents, ‘cause presumably it would be a priority in their
lives. And if it wasn’t a priority in their lives, then they’re still
parents, they’re just bad parents, right? We frankly did not want to
see them being either good parents or bad parents. We wanted them to
be Will and Grace.”
It will be Groundhog Day, too, for Jack (Sean Hayes) and Karen (Megan
Mullally). Though they were last seen living together with Rosario the
maid in the finale, Jack will return as Will and Grace’s omnipresent
neighbor while Karen will still get her drink on and live in that
mansion. Will and Grace’s careers will be the same, and Jack the actor
will be teaching his own craft called “Jackting.http://ew.com/tv/2017/08/02/will-grace-revival-finale/”
I came back to make an edit. The Press Release from 9.01 is out. It seems to confirm that this does in fact take place, 11 Years Later...
"WILL & GRACE" "11 YEARS LATER"
09/28/2017 (09:00PM - 09:30PM) (Thursday) : PREMIERE - AFTER 11 YEARS,
THE HIGHLY ANTICIPATED RETURN OF "WILL & GRACE" - We pick up with Will
(Eric McCormack), Grace (Debra Messing), Jack (Sean Hayes), and Karen
(Megan Mullally) 11 years since we last saw them. Will and Grace both
falter when their political beliefs are put to the test. Jack and
Karen help Will and Grace hide their secret shame from each other, but
the truth finally comes out.