I do not agree with you that dialect use is increasing. Through globalization, internet and media there is a return to Standard Arabic.
The situation within the Neo-Latin languages was different. The Arab conquest of North Africa is now 1300 years ago. There is no governmental or popular power in the Arab world that want to split up and dialectalize their language. In the Romance part of Europe this was different - people wanted to abandon Latin and speak the languages evolved from it. The Qur'an is the strong power which hold those countries together.
I think in a hundred or more years down the road MSA will be a dead language and that will have only importance for certain texts.
That ship has sailed. E.g. in Tunisia, Arabic got nearly completely replaced by French, now there is a comeback to Arabic. 50 years ago, most people spoke Tunisian Arabic, but all people wrote in French.. Now most people still speak Tunisian Arabic, but more and more is written in Modern Standard Arabic, which also reflects back to the oral language.
Let's take a look at Germany, France or many other European countries. 100 years ago there where hundreds of dialects in Germany, most were not mutually intellegible. So, if you go some villages further you would not understand the language, because it is different. Now dialects are completely killed here. There are some small accental differences, but if you listen to those a while you will understand them. That's because of globalization and increased migration. I am sure the same will happen in Arabic countries, maybe not so extensive as in Europe, but I am sure it will happen.