Well, it is her choice as to what she wants to put in the nursery, but as many have said, she'll find out she'll need more than one quiltie for the babe. She'll probably ask you to make one down the line, or you can just give one as a 1st birthday gift.
In the meantime, how about some nice bibs or quilted burp pads (on one side)? Fun little quilted booties?