After having done the same analysis for FPS: http://gamrconnect.vgchartz.com/thread.php?id=228761&page=1# , I am now doing it for the TPS genre.
These are all console combined sales for each title of the main series of the TPS major franchises so far:
Keep in mind that only the major franchises of the TPS genre are included and these are console only (no PC). Splatoon could be included in a future revision since we don't have the numbers yet for its sequel.
Resident Evil: This franchise is clearly on a downhill. RE7 sales are bad compared to what it did with RE5/RE6. Even when including digital sales, the game would not have reached 4M yet. Capcom would have to achieve a feat to reverse this trending with RE8 at this point.
Gears of War: The GoW franchise is also on a downhill compared to kind of numbers it did in the past. Again, the digital numbers would place GoW4 in a better position but would not be comparable to GoW1/2/3 numbers.
Mass Effect: Andromeda being considered as the fourth major entry of the series, is doing poorly so far. The game might have been released only 4 months ago, it did not managed to sell 2 million so far which is disappointing to say the least.
Metal Gear Solid: Here are better news for the TPS genre as the last MGS game did fair numbers. MGSV being released on 4 different platforms managed to sell about as well as MGS4 did on PS3. The fact that there was a 7 years gap betweeen the release of MGS4 and MGSV might have helped too.
Taking all this into consideration, we may come to the same conclusion as the one for FPS: the genre is faltering. Developers would have to put some fresh new concepts to increase the sales of the shooter genre overall.
What are your thoughts?
Edit: Due to many complaints, I have added Uncharted series as well.