"when I'm traveling/consuming media/couch surfing/shopping with wife - tablet is much more convenient"
I hear people say this but I really disagree. I have never found a tablet more convenient.
With a tablet you either have to hold it up with one hand, while you use your other hand to navigate, or you have some sort of case with a built-in stand that is never as stabile as a laptop. You also have to be very careful holding the tablet, because otherwise you'll touch the screen and unintentionally open or close the app you're using. Also when you use a case with a tablet it often makes it as heavy as an actual laptop.
Not to mention all the keyboard shortcuts that make navigating the OS faster than a touch-based OS. I just don't really "get" tablets. I've tried iPads and Android tablets but I always grab my laptop instead.