I agree that the Seventh Doctor's era introduced some stylistic or conceptual things that have continued to be part of the character. The Tenth Doctor's "Don't you think she looks tired?" -- planting a seed to bring down a government whose actions he objected to -- is very much in the Seventh Doctor's spirit.
But in terms of actual things or concepts -- new aliens, new characters, new terminology, new devices -- there's very little from the Seventh Doctor's era that's been followed up on since.
But in terms of actual things or concepts -- new aliens, new characters, new terminology, new devices -- there's very little from the Seventh Doctor's era that's been followed up on since.