The same holds true for NXT. Pooling has already begun and it will continue.

And Proof-of-Node becomes more interesting.

Could you elaborate more on this?

What do you think about TaPoS?

Neither. I'm pretty just watching evolving of technologies. What's TaPoS?

Have a look at here :https://docs.google.com/document/d/1RLcjSXWuU9vBJzzqLEXVACSCdn8zXKTTJRN_LfoCjNY/edit?pli=1