This is the same dynamics we have seen before. How many national supermarket chains are there? Crossing Walmart or Amazon seem very analogous here. If anything, business in the past was more feudalistic, as people were bound to a given market and they are now able to negotiate more broadly.

All of the replies here seem to point out that monopolies are bad and tech companies tend to be monopolistic. This is obvious and we all agree. However, when asked what is the difference between a mall and Apple Store, Varoufakis did not mention a monopoly or oligopoly as the issue, he mentioned rent. Specifically he mentioned that getting a percentage of profit was the biggest issue. I think this is not a strong argument for calling it a new economic model.