Why would anyone use a tablet when they can use a more powerful laptop instead? The answer should be obvious: Portability.Whether one need more or not (I don’t) is another discussion. What I think does hurt the m43 system a lot is that when people look at all the cameras fromt he competition, which is APSC, they are all 24MP. That sounds like A LOT more even though it isn’t. Why would anyone, except for people who know the technicalities (which is a minority), buy 16MP instead of 24MP ?
Generally speaking, an M43 system is smaller, lighter and has better stabilization than APS. Hence the appeal.