It's, at best, a conversation starter. Hofstadter in his Metamagical Themas had a chapter on how the predictions are worded specifically to be vague and feel good so that any of them could apply to any one.

Taken more seriously, they have serious social effects. e.g. https://en.wikipedia.org/wiki/Mangala_Dosha

I expect the interest in "new age" religions or quasi-religious practices to go up as traditional religions move out of societies. My experience is that there is a part of the human being that requires religion and spirituality and they will find outlets to satiate their needs.