My family was religious enough that they made it super clear that Santa was fake. Us kids still got little gifts “from Santa,” but they were of the stocking-stuffer variety. All other gifts were from specific people. As a kid I liked getting stuff, but the more important thing about the holiday was spending time with family, and them showing their love. Gifts was one way to show, but spending time, preparing meals, and just being present without worrying about other life issues also did it. It is the thought that counts, but you have to show that you’re thinking about them. Honestly, your kids might appreciate not having to pretend they still believe in Santa. As other people have said here, don’t catch your kids in the crossfire. If there’s something they’re really looking forward to, get it for them, but label it “from Dad” or Mom and Dad if you’re feeling generous. If they don’t have their hopes on something, a trip or experience might be good. Not sure what experience fits both a 6 year old and a 12, but I assume you know your kids better than I do. As for the rest of your family, they can stick it. They don’t seem interested in participating in the holiday, so don’t include them.
I have a Viture One and an Xreal Air 2. They’re both solid for gaming as a screen directly attached to your face. Neither do floating or body-anchored screens out of the box. The Xreal can do it with a breakout box, and the new generation of the Xreal that’s coming out in March is supposed to do it on its own.
Viture One came with a better carrying case and is easier to hook up in the dark. It’s slightly more comfortable to wear, and it has built-in focusing dials. Picture quality is good for gaming and watching videos, but not good enough for extended text reading - books and websites aren’t recommended.
The Xreal Air 2 has a much better screen, good enough for reading for an hour or so. The edges get some chromatic aberration, but most of the screen is good. It requires prescription inserts if you need glasses - a mixed blessing since it adds a hidden $80 to the price, but means you can wear them as real glasses. The nose bridge has size options, but none are quite as comfortable as the Viture. The Xreal uses standard USB-C cables, which is good for compatibility, but bad for attaching in the dark. As mentioned above, Xreal has a breakout box that gives different options for how the screen is displayed - attached to your head, attached with a delay (better for motion sickness), PiP so you can look at the real world with your media in the corner of your vision, and attached to your body giving the illusion of a TV screen sitting a distance from you.
It depends on what you’re looking to do with the screen, but I’d probably wait until the new generation of Xreals.