Yeah, from the get-go, Mr. Ishihara said his hope was for Pokkén to become a third pillar at Worlds.
I question if it'll continue at CEO, EVO etc. (though it has a decent shot. The owner of SmashBoards is actually the tournament organizer at The Pokémon Company International, which probably is a large part of how that happened), but it may still have a Pokémon following akin to VGC.
I do question its longevity beyond this year, however.
How so? Bandai Namco are quite adept at developing for HD systems. Smash Bros. for Wii U, for example, was 1080p60.