I think the A3000 is a low cost toe dip into that form factor. The NX20 is the only Mirrorless with this form factor that fits a Grown-ups hands. (I'm look at you MFT) I think we will see more A Series mirrorless bodies, and I'm not going to lie.. it's got me pleased.
I learned Photography the NX11 and NX20... I tired a OFV recently... as clear as it was, I prefer the EVF for the functionality it provides me when shooting. And if Samsung isn't going to allow Third Party Lens support, and isn't going to provide stronger buffers and processors in it's cameras I have no issue with switching. I would like to stay with Samsung though, I really do enjoy shooting with the NX20 when it is working as it should.