Keep it simple: In general, interfaces should use simple geometric forms, minimal contours, and a restricted color palette comprised primarily of less-saturated or neutral colors balanced with a few high contrast accent colors that emphasize important information.
If your persona has goals and the product has magical powers to meet them, how simple could the interaction be? This kind of thinking is useful to help designers look outside the box.
To scenes by memory’s silver chain Close-linked, and ever yet apart, That like the vine, whose tendrils young Around some fostering branch have clung, Grown with its growth, as tho’ it sprung From one united heart.
Computer memories work in a manner alien to human memories. My memory lets me recognize the faces of my friends, whereas my own computer never even recognizes me.
