Daggerfall is still king. You could travel south towards the deserts. or north towards the snowy regions or the mountainous regions in the north-west or in the more continental European areas around Daggerfall.
I was convinced, just hoping for some lush forests and mountains with snow too like the variety Onlivion brought just with a loooooot more detail now thanks to the next generation consoles. That kind of desert environment does not match the trailer that much so it may be one of the various parts you can explore and if it were the biggest one by far it would get old and repetitive a bit fast IMHO.