I don't know if it would be as popular, most places selling the 16gb version for around £400, it would likely be around £450.
I would have thought the main reason is probably manufacturing.
If they do bring 32gb with cellular I might upgrade... Or maybe I will just get a bigger SD card.
I do really love this tablet and really don't see anyone coming out with anything that will truly trounce it for a good while.
I was thinking to myself, what would make the perfect tablet and this is almost there tbh, my only real gripe with it is the Samsung customisations, like the notification bar filling the whole screen and the general theme.