I like this sentence you wrote. I think it makes an acceptable thesis statement. However, some teachers think you should not refer to the essay in the essay. So, you maybe should not say, "This essay will be about..."
You can say something bold and argumentative. Say something some people might disagree with, like this:
Technology has made society better and stronger in every way, because cell phones, iPods, video games, computers, the Internet, and
sateillite satellite television all make us more effective in our work.
This is a bold statement. Some people will say, "No, technology makes us lazy," and you must argue with them boldly.