If you link the new box to the same Roku account as the old one, all your currently installed channels will also appear on the new box.
Channels are tied to the account, not the individual Roku.
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No, I don't work for Roku.
Netflix Player N1000X, XDS 2100X (premature death by lightning)
Roku2 XD 3050X, Roku2 XS 3100R, Roku2 4210R