And holding land to parasitically benefit from neighbors improving the neighborhood would become unprofitable. With land no longer a money parking/hedging instrument of the rich, all that non-functional demand would disappear and land would get cheaper.
Interesting that eliminating a recurrent wealth tax would help the non-rich so much. (Who could also improve their properties without raising their own taxes).
But carefully aligning incentives in the market, in the direction of encouraging not disincentivizing investment on par with other options, I.e. not treating different kinds of investments differently tax wise, usually helps everyone in the end.
Today a wealthy person with one house on 100 acres, pays a significantly lower tax per acre than a regular person with that same house on a fraction of an acre. The poor are subsidizing rich land ownership.