The Potential That Technology Yields

As many of you are aware (since you're using it), technology holds quite a significant potential. By technology, I am speaking in general terms and nothing specific.

The world and society as we know, is constantly changing to what seems to be around technology.

This theory (or "law" if you will) might not be so obvious to some. But to those of us who are more immersed in the world of technology and related subject matter, this is something that we see quite often.

My question is, will there be a time when this technology will strictly be a disadvantage to us? At the present, it seems like it is only beneficial.

In the field of medicine, robotics (and related items) as well as computers are being used to treat patients. New technologies are being developed to assist and better the lives of many individuals.

The following link provides an example of what direction technology is going towards:
http://www.youtube.com/watch?v=_lXRHPKIvLc
What we see here is quite a graphic example of how quickly what we believe to be "human" is merging with what we believe to be "machine".

Although this might be a bit too extreme, it seems like this is a possible scenario that technology will go towards.

There are already android-like machines being used today. Although not fully-automated, self aware, etc, it is quite shocking that many of the things that were considered impossible is slowly moving towards the realm of possibility.
We are at the cusp in technology where something from the likes of a Star Wars movie is becoming more real.
Is this the right direction? Do any of you have any concerns what so ever about the risks that involved here such as over-dependence or maybe (hopefully not) a post-apocalyptic scenario like that of "The Future" in the Terminator films where the world is overrun by psychotic cybernetic beings with the intention of overtaking and wiping out humanity? That example might be an extreme (again) and something that seems like it's impossible, but look at the progress technology is has made within even the last decade.