Worthwhile for eternity?

I came up with an interesting thought experiment.  We all have different interests and things we either like to spend time on or need to spend time on based upon decisions we have made in the past.
This is a test we can do for ourselves, but only for ourselves.  We must never do this for someone else, as we cannot know someone else's heart, thoughts or past circumstances. 
Think through those things that you like to do, find appealing or enjoy.  Now ask yourself, will these things be in heaven / the new earth?  If we can answer "yes" to this question, then we can at least justify our involvement in or pleasure in it.  But if we answer "no", we had better give some serious consideration to why we like that particular thing/activity.  If we cannot envision this thing or activity in heaven, then our involvement is suspect.
Why do something now that is not possible or acceptable in the immediate presence of God?