On stardate 47988, Captain Picard started traveling back and forth through time, as part of an elaborate test of humanity by the Q Continuum. One of the time periods he visited was an alternate version of the year 2395 (25 years in his future), where a heavily refitted Enterprise-D was still in service as the flagship of now Admiral William Riker.
While the structure of the bridge itself was unchanged, the command chair now sat on a raised platform flanked by two guest seats; the circuitry access panels at the sides of the bridge featured a different design and were colored red; and all the door signage featured large vertical stripes, also colored red; among other smaller changes.
(You can read up on the research done onto the changes to the set during the 7 seasons of TNG and ‘Generations’ here: http://www.ex-astris-scientia.org/inconsistencies/enterprise-d-bridge.htm)