Land-value tax doesn't have huge inefficiencies like some other taxes. But the hard part is assessing "value". How should land value be decided? The book "Radical Markets" has some good insights on how to find the value of every plot of land by using markets.
I remember that in my first year of CS, the professor asked us to implement this algorithm. We had just learned our first computer language(C by the way). Result: nobody was able to do it, and everybody got a 10 after the professor realized it.
The thing is, in the formula, you have to use the rate "r" to discount the future profits. If the "r" decreases, the monetary value of stocks in the present increase, even though the cashflow has not changed. So, even if coronavirus decreases short-term profits, the effect it has on the global economy can lower interest rates, causing the present value of stocks to increase.
I think that this project has the economics to work, so, even if Google abandons it, somebody should eventually build it. Why I think streaming games is a powerful thing: Piracy. It will be more difficult to get a ilegal copy of a game that was never released to the public, only run on servers. But yes, kind of sucks to who wants to test games or live in third world countries.