The future is unknown (yeah, duh), and if it goes the way of some various science fiction stories I've read, then there could be many reasons our everyday items would be forgotten.
1. We lose all technology and go back to living in an preindustrial society, then we might lose our history and soon all is forgotten.
2. We go underground to live, and soon forget all things that pertain to the outside world.
3. We leave the dead earth and move to a new planet with all unique items to fit in this futuristic world.
How many of these items do you believe people will remember in 500 years or a thousand?