alt Hacker NewsReal estate cannot move. If you are wealthy enough to own a second home worth at least $1M or more, you are likely very wealthy (top 2% of US households by net worth threshold is ~$5.5 million). It is a wealth tax implemented on a real estate asset component of a high net worth human's total portfolio.
It affects wealth, but the owner can also sell the property to someone who'll live in it and then they won't be taxed despite owning expensive property. So it's more targeted than a general wealth tax would be and I think the intent is to free up housing supply a bit.