I just saw a Minecraft version of Legos on TV.
Apparently it's a version of Legos completely made of blocks...
I have always thought minecraft legos is a great idea.
For one thing, they pretty much are the same things, you build your imagination with building blocks. The largest argument I've heard AGAINST them is "why not just play the game?", well that's not what the legos are for.
Pretty much I see it as saving one of your creations outside of the game to display it on the shelf, or something. Imagine you're 5-10 years old and your parents let you play Minecraft, and you like to build things in the game, well with those you'd be able to build something you're proud of outside of the game to save and remember it after you start a new world or move on to something else.
I think it's just kinda a nice way to save a memory.