[AaronBrown]

Aside from Xhad's excellent point, I would restate your thesis as implied odds approach pot odds on later rounds.

You're thinking of a situation in which your implied odds are greater than your pot odds, in which case the implied odds go down. But there are also cases in which implied odds are lower than pot odds, in that case the implied odds go up.

The player who gains the most information from undealt cards will have better implied odds than pot odds. The player who gains the least information will have worse implied odds. Generally speaking, drawing hands get more information from undealt cards, made hands get less.