Especially when there was a close up of her face when she said "I look very much like the girl you're destined to marry". She defintely didn't look like Lana Lang, Lori Lemaris, etc at all only looked like Lois. So in a way it showed who Clark would eventually chose.
That and the way Clark got so Hot for her. And Her for him. You know...I wish they had done a subplot of Laurel and Lu hanging out and having her thoughts on her crush for Clark and having a sorta resentment for Laurel representing that she would never get Clark...i think it would have made an excellent subplot of sorts.