My next tablet will be…
8″ screen size
Since that is around biggest what can be carried everywhere.
2 GB of memory
Since I’m going to need that memory.
Android
Since that shall be winning standard in the future, so I bet into winner.
Micro SD card slot
Then what about discspace? Well, right not my tablet has 8 GB advertised space and some 6 GB actual storage, and it has been sufficient since table has mini SD card. Also transferring big files is easy using card, since I’ve very small USB adapter, which allows attach it into almost any device in the world (except apple products of course…).