What we will learn about brain before 2100

I've seen the speech of the neuroengineer:

https://www.ted.com/talks/sam_rodriques_neuroscience_s_next_100_years#t-6803

He told that nowadays to study brain we use animals for instance mouse or monkey. And scientists try to model human behaviour or mental disease. But animals brain is not complicated enough to be a model of human brain. To study carefully human brain or understand origin of brain diseases (like Parkinson) it is necessary to measure electrical activity of particular neurons. Now we can physically do it on animals but no way to do it on humans. 

One possible way is to drill tiny holes in the skull and put there electrical probes. Than we can start study healthy brain instead of ill. The next possible step is connect brain to the computer and record all memories on hard drives or take a photos from eyes. 

The speaker believes that in 2100 neuroscience will be able to measure electrical activity of particular neurons and treat all mental deseases.