I think its a normal marketing practice. If you see car commercials, theyre always shown with the optional large wheel, spoiler kit, LED lights, leather seat, and some sort of (laggy and overpriced) gizmos. None of them are included.The marketing always shows the KB, the commercials always show a KB and it's marketed as a tablet that can replace your laptop. Sure it can, but that functionality actually cost extra.
IMO that's why Microsoft should advertise the Core i7 version, and the fact that you can get a super powerful device with Core i7 in that thin package. If you can fit Core i7, with all the required cooling system and all-day battery into 800gr, 9.1mm package, that's definitely a better advertisement material than the USB port or detachable keyboard.I'm sure there are plenty of people with their 3kg laptops who see me with my SP3 and think i'm using an inferior tablet that can't do anything.
I don't think its THAT expensive. Remember, there are keyboards with wireless connectivity and batteries for just $30, while the Type Cover is neither, yet priced $100 more expensive.So those who don't want or need the keyboard (i.e. all those who wanted to use a Logitech or Wedge Keyboard), what do say to them? Microsoft would obviously need to raise the cost to cover they keyboard cost (R&D, Manufacturing, Packaging and Logistics). The Cover is manufactured separately from the Surface Devices. Not everyone wants, needs a Type Cover.
That said, I would expect Microsoft to bundle a proper cover on it. Type Cover is the jack of all trades. Its not a great keyboard, its not a great cover either. What I do expect is a proper cover, a cover that's very light, and most importantly, flat when you fold it back. Its called the Touch Cover. It might not be a great keyboard, but at least it makes a great cover with occasional typing capability. That's the kind of cover that I would leave attached on the device all the time. The Type Cover simply negates all the diet the Surface Pro 3 did in the first place. As a matter of fact, the total weight of the tablet+cover is almost identical between the Surface Pro 1/2 and 3, simply because the cover is larger, and hence, heavier