Beyond Monoculture

A common fear about the advance of globalization is the development of a global monoculture in which local traditions, languages, and ways will disappear under the shadow of the developed world's exported values and institutions. I agree with the rationality of this fear, as this cultural dissolution has already advanced around the globe in ways different than the mingling of cultures seen over the past few thousand years. But in today's thought, notions of cultural absoluteness and authenticity are out, so how then to describe this phenomenon of "cultural loss" while recognizing that cultural is fluid, ever-changing, and unable to have an ideal?
Rather than worrying specifically about a global monoculture, I find it more frightening and more accurate to conceive of the oncoming age of the global mono-experience. While culture may never be "lost," the variety of human experience can be. Certainly my neighbor and I may have an infinitely different range of experiences in our lives, but the we live essentially interchangeable lives in terms of lifestyle and activity. There is no shortage of dystopian novels and movies to this effect, and I believe that the recent focus on localism is a reaction to this identity-erasing globalism.
Maybe I'm being romantic, thinking of far-off people as strange and wondrous. I see my own life as vastly different from that of my neighbor, yet I believe that diversity of experience on all levels enriches humanity and is our security in times of crisis. When we are all the same, we are susceptible to the same threats, much like monoculture agriculture. The Irish Potato Famine eliminated an entire species of potato, and since there was little other agriculture, people starved. Similarly, when the world sheds its nomads, forest-dwellers, and subsistence farmers in the name of quality of living and growth, these alternative ways of living are lost and we know no longer what to do if the Western conception of daily life is fundamentally challenged.
I'm making a poor argument for the necessity of diversity as we know it today, and as I write, I wonder if my idea is more poetic than realistic. What do you think? Does the threat of the mono-experience exist?