As someone who will upgrade to Xbox One when Halo 5 arrives, from what I see the Xbox camp is doing just fine. Losing out to PS4 has forced Microsoft to reevaluate its priorities and as a result Xbox One is getting frequent and meaningful updates and a variety of genres of games that 360 didn't have.
But I can imagine sentiments for Nintendo and Sony. Nintendo only has the money and resources to invest in fan-favourite 1st party games, with marketshare limiting 3rd party offerings. And with Sony, like 360 before them, winning breeds complacency, with the top games coming from 3rd party developers, aside from the odd flagship 1st party game, which take years between releases.
Xbox: Best hardware, Game Pass best value, best BC, more 1st party genres and multiplayer titles.
