The $ 1000 are magic number for you? If one day BTC price reaches $ 1000 remains the question of the value of the dollar. Maybe then $ 1000 will not be a magic value like today price 11737.48 JPN / BTC. More interesting will be, for example the BTC/GOLD value. Few people know what it is hyperinflation (from own experience).
The $ 1000 represent good portion of monthly income for most. But I agree in 20 years it might not represent interesting amount for most
It is better to consider whether in the future for 1 BTC could we buy a house, a car, or maybe hamburger.
With Bitcoin, it will be, "I will gladly pay you Tuesday for 500 hamburgers today"