Very good idea, Nic
LED lights are also a safer option, as they dont burn hot. We swapped our elderly conventional lights which had served us well for many a good year, for LED lights when we got Moray. Our other cats never bothered with the tree, and neither does Moray bless him, but always worth thinking about.
Paddy used to bat the odd bauble as he went past, and Mac would steal baubles from the tree and smack them round the house (not to self: remove fragile glass baubles and replace with shatterproof plastic ones)
Ross would knock them off then look at them as if to say "Who dun that?"
but all in all, I've been lucky with our cats in that regard.
For me, the bit I love about Christmas, is getting the boys stockings down, and leaving them somewhere near the tree on Christmas Eve. The lure of the "yeeeeooow stinkee" catnip bananas and sardines always gets them going - snigffing the air, investigating the stockings and having a good old nose round, it has us in stitches. And of course they always get to open one present each on Christmas Eve, so they don't get disappointed.