What will New Earth, New Heavens and New Jerusalem really be like according to Catholicism?

Revelation:21 talks about the New Earth and New Heavens. It also talks about the holy city New Jerusalem. Various physical aspects of this city is described by St. John. Is this city and the New Earth and New Heavens (new universe) physical places as far as Catholics must understand? (St. John specially emphasises on the dimensions of the city in 'human measurements' which should imply that the city is a very physical place just as this earth) Moreover, in (Isa. 65:21-23) Bible very literally says that the righteous people will even "build houses and plant vineyards" in the New creation. Shouldn't this imply that the New creation and New Jerusalem will be just as physical? Some people also say that many aspects of human work and creativity (such as artists, musicians and other good works directed only for God's purpose) will also continue in the New Earth, because work was a part of God's original creation and it will be part of his coming New Creation also. Is this also true? In (Mic. 4:3) it is said that “They will beat their swords into plowshares and their spears into pruning hooks”. This must imply that there will be work in New Earth too, must it not?(Works without 'thorns and thistles') Will there also be human creations like technology etc.? What does the Church say about it?