well, lets talk about adventure games, its well known by everyone of us that nowadays adventure gaming genre is dead...
I suggest you to say what "modern"(since late 90's) adventure games are closer to the old adventure games
The last adventure games i played that reminded me of sierra games were Broken Sword 1-2, they have too much dialogue i think, but they have something that made them special in my opinion.
i believe that the future of true adventure gaming is in fanprojects as King quest 9 or Tierra remakes.