[Craftmore]

That begs another question,,so people in heaven will die?
What happens then?another heaven or hell?because if you only live to be 100 your cursed?cursed in heaven?

[right way right]

This is evidently a time of combination of heaven and earth.

It is Gods finished creation.
The phrase 100 years is symbolic of very long life. God has promised eternal life in Jesus Christ, that is what I expect.

If you read from the Revelations chapters 21-22 it talks of the accursed being placed in the lake of fire and the new heaven and earth.

I found this commentary.

http://bible.cc/isaiah/65-20.htm

Hope it helps.