Think of heaven and the people worshipping him, truthfully what image do you see? People like yourself? Mostly English speaking, middle class, singing a nice tune, not too loud, clapping hands to the beat? . . . . .At one time I did - but that is not a biblical image. God is so greatly to be praised that he will have a beautiful variety of every language, every large and small tribe and ethnic group - worshiping him. Every skin color, size, tradition, dialect, dancing, chanting, singing, clapping on and off beat, stomping - not just conservative-stand in a row, clap in unison, English speaking believers :).
There are still many, many unreached people groups. People who have NEVER heard the gospel and who have none of God's word in their own language -we need to pray fervently for them. There are hurting and poor people, orphans and widows in many nations - we need to pray for them. There are Christians still being martyred in many nations - we need to pray for them.