The fact is screens are getting bigger and clearer, but still do the same job. Samsung showed off one that could show two different programmes at the same time - but I seem to recall LG demoing a similar screen a number of years ago. What's new to see when everything has been invented ?
We're now on the fourth generation iPad and it's a testament to the initial vision for the product that it's barely distinguishable from the first generation product.
Television is a very simple medium that's getting more and more complex at a time when most technology is going in the other direction so perhaps it's not surprising that Samsung's major play seems to be a TV with, er, a simpler interface.