Once again, my efforts to read the whole internet lead to disappointment:
Which Things From Our Culture Will Live On"
The Pokemon test for Wikipedia Notability
For what it's worth my list of the five new things from my lifetime most likely to still be around in 2300 is as follows:
5. Wireless networking, of some sort
4. Dubai
3. Genetically modified food
2. Video games
1. Robust search.