No way they're going to remove big, normal servers for 5-slot ones to play with friends. Regular servers will stay. Realms is for people whose computers can't handle servers for them and their friends to play on.
Just as the title says. Will having the Realms remove multipayer servers?
Let's clear something up once and for all:
Realms are for small groups of friends who want to play together.
Servers are for actual people who want to make money or have a large amount of players come on it.