What's the purpose of Mega Evolutions?

Did GameFreak really lost it or they are trying out something new which was unexpected for all Pokemon fans? Technically, I don't see nothing wrong with the idea of Mega Evolutions, it's just I'm having a strong feeling that if Mega Evolutions will remain in the next Pokemon games in the future, then there's a possibility that there won't be any future pre-evolutions or evolutions to previous Pokemon from the past. Look, I'm trying to figure out what's the main point about Mega Evolutions if it just only transforming your Pokemon into their strongest form only in battle and nowhere else. I'm mean, is GameFreak telling us something that we all Pokemon fans out there might expect next in the future Pokemon games or is it that they're doing this to achieve something in Pokemon, what do y'all think about Mega Evolutions so far?

I kinda wonder that too and I think they might be in future games.I don't hate them or anything, though.I thought they were made to kinda "update" past Pokemon.

Yea, I know what you mean, I always thought Mega Evolutions were regular evolutions to Pokemon with extraordinary effects, but no, they alter the Pokemon's form in battle and make them stronger than ever. I just wish they could have save that type of idea for something else in the future instead being featured in X & Y if you know what I mean though.....

I see it as a new form of way to grab old and new pokemon fans to get a new taste of pokemon at a whole other level I actually liked how most of the forms turned out