All my christmas trees are fake and delightfully vintage. As are most of my decorations / baubles, btw. I find it's such a shame to grow a lovely tree, then cut it down for the sake of a couple of weeks before discarding it. Yes, I know, you can get rooted ones - I have a couple of norwegian spruces in my garden that got waaaay too big to bring indoors!
As for decorations, my newest bits are lights (LED of course, warm white by preference), and strings of silver and gold beads which I use on the tree in lieu of tinsel.
I don't use glass baubles, lametta or tinsel anymore, because none of them are cat safe.