The Surface Pro 3 seems too expensive and too heavy to me. With the keyboard cover and kick stand, it's not far off from carrying a laptop.
Broadwell is supposedly launching this year so many more laptops should be going fan-less and getting a battery life boost. There are already laptops with touchscreens (I don't like those by the way) so what exactly is the advantage of a tablet that wants to replace a laptop? It's not cost, and physical attributes seem to be a wash as well.