I see what you are saying about the screen size, but my basic idea is to use a potential S4 as a pure tablet for which reason, it cannot be too big or unwieldy. I think the S3 is already pushing it and recently I tried using the SP4 as one and while the tablet experience was very good, but it really cannot be used as a tablet (when on the hop). Thus the argument for a more manageable size. Again, with size being the primary concern, I think a Surface mini would be too small. It would be perfect for writing notes (allegedly as Panos uses one), it would not be a good size for comfortable reading and/ or video consumption.