in the Far East you'll see that internet cafes are alive and well - usually crammed with young travellers communicating with friends and family back home. My son went travelling through South America, New Zealand, Australia, Thailand and Malaysia the year after he graduated and he used internet cafes wherever he could find them.
I regularly see quite a few as I travel around London, and they always seem to have people inside. I don't think I would recommend them as an investment opprotunity though - technology's getting cheaper and easier, and almost everyone will eventually carry a device that can send/receive email and/or surf the web. Just wait until your mobile phone has a built-in hard drive - it won't be long.