And if not, is one really on the horizon?
I can safely answer no on both counts
i mean this is such a silly question considering the fact that almost no consoles going back two decades have launched with a killer app.
The switch didn't launch with shit. Zelda was on the Wii u.
The ps4, arguably the best lineup of killer apps since maybe ps2 launched with killxone shadowfail and knack.
Xbox one launched with no killer apps.
Wii u launched without killer apps unless you consider zombie u a killer app which i don't think you should.
Ps3 launched with no killer apps. Resistance was ok but not a killer must own game.
Wii launched with a Zelda game that was also on the GameCube.
Xbox 360 didn't get its first killer app until 2006 when gears launched a full year after launch.
The og Xbox was the last console that launched with a killer app. But halo was competing with a year old ps2 with its own killer apps like dmcv, mgs2, silent hill 2, gta3 and ffx. So who wins that battle of killer apps?
The ps3 had a similar underwhelming launch but by the end of their first year, they had resistance, motorstorm, heavenly sword, warhawk, ratchet, and uncharted all salvage that year. Ps5 has ratchet, gow, horizon and gt7 all slated to come out this year. Good chance they get pushed back but right now the dates they have given are this year. It will have its killer apps.