Trading using Web app vs program installed

 

I  see multiple sites showing all charts on web, even metatrader now have a Web trading. I was thinking, in a really near future, what will happen with 

the way of trading using local programs installed, it will disappear, with only trading and seeing web charts, or there is a reason to believe it will stay this

will remain  for a long time?  I prefer the program installed, it looks more secure, so what do you think about that my friends

Reason: