Let your work be shown to your servants,
and your glorious power to their children.
In the previous few verses the Psalmist is speaking of getting the heart right, getting the perspective right. After he says it though, he still calls out to God to "see" God. He still wants to see what God is doing while he is here on this earth. He knows his days are short, he knows he needs to be satisfied in God and find his joy in God, but he still has the desire to "see" God, and he doesn't want to wait until he is dead.
He also wants his children (and the children of all who are seeking after God) to "see" God now. So he cries out for God to allow His work to be shown, for His power to be shown.