Switch is a lot of money and has terrible battery life, though. I'd really like to wait until it's older and cheaper, especially if they release a revamped version (especially if it's small enough to fit in a pocket and has better battery life). Don't get me wrong, I'm certainly interested in it, but I rarely buy things new and at full price. I don't really have that kind of cash.
I'm aware Vita is mostly dead, but it has a catalog of some decent games. And at $275 for PS4+Vita, that seems like a decent bet.
Speaking from personal experience, which may be different for you based on your tastes, the PS4/ Vita are both pretty shit. Decent enough hardware but nothing really special, the exclusives are vastly over rated and not yet on the level the PS3 had, HZD being the biggest pile of overhyped tripe I've played this console gen (After Destiny of course!). Overall I'm pretty disappointed in everything consoles have offered over the last 5 years. Switch/ PC is the only combo anyone needs atm unless they're easily pleased by shiny visuals.
Don't buy it just for HZD, ensure you have a catologue of titles that interest you, else you're just throwing money up the wall when you could wait 12 months and pick a PS4 up cheap. $275 is a lot of money to throw money at something simply for one game, which could end up being a disappointment for you.
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"Using a key to gouge expletives on another's vehicle is a sign of trust, and friendship."