I am just kinda curious because I have seen similar claims before;
Where does it say the 7 Letters to the 7 Churches are as Ages or periods of time?
To be upfront, I personally do not think that Ages are being described. Though indeed, for those to whom it applies the answer to Laodicea is to be zealous therefore.
In a book that is prophetic in nature...
Rev 1:1 The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John:
And looks all the way down through time past the second coming of Christ...
Rev 1:7 Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.
To the New Heavens and New Earth...
Rev 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
Rev 21:2 And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.
Rev 21:3 And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God.
On throughout eternity...
Rev 22:1 And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb.
Rev 22:2 In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
Rev 22:3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
Rev 22:4 And they shall see his face; and his name shall be in their foreheads.
Rev 22:5 And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever.
Why would one suppose that two complete chapters (Rev 2 and 3) would be dedicated to events that were current at the time they were written and have no future meaning?