Without more context, I would say that it means "she lives for the present."
It's a magazine writer talking about Kate Middleton:
"She's a very modern English woman," says Joanne Fowler, senior writer for People, which closely covers all royals but especially the British variety. "She's not like Diana, who was from an aristocratic family. (Middleton) is smart. She's athletic,
she's very much of the moment. Everything about her is well thought out. She's handled her time in the limelight with incredible grace and dignity, not making a mess of anything."
Can I say she's a pragmatic person, not a dreamer?
