We just updated the description of the meetup to mention an additional presentation:
Emmanuel Rochette from Catallaxy will present an overview of proof-of-stake. The discussion will start with a short comparison between proof-of-work (PoW) and proof-of-stake (PoS) as a way to explain how the latter came about. It will then follow the evolution of PoS through its uses in different cryptocurrencies. The discussion will end with the attacks that threaten all systems using PoS and their corresponding solutions.
Some of this was supposed to be covered in Zakaria’s presentation but now Zakaria’s presentation will focus more on talking about proof-of-stake in the context of the Tezos blockchain (e.g. explaining how baking works). He will also compare the implementation of proof-of-stake in Tezos to another popular variant (contrasting liquid proof-of-stake and delegated proof-of-stake) and discuss other aspects of Tezos (governance, smart contracts, functional programming, etc.).