Regarding 'pro' work, that's very subjective I would think.

Take Jason Lanier for example, wouldn't his work be 'pro' work? If not, then what's 'pro' work?

It's simply what our needs are - if it's sufficient for the job, then it works.

I think a DSLR will always have the advantage of more memory card slots and longer battery life (bigger batteries) though (until technology becomes even smaller again)

Weight is a factor - though many opt for the lighter mirrorless, there is definitely a huge market for the heavier DSLR for various needs, until weight actually starts becoming an issue where something has to give.

So it's just needs.

And just as Kym said, once we start on a path, it isn't to move out. At the same time, that's where Sony's pricking the nerves - adaptors on the A series. Yes, older versions weren't that good, but the new ones, it's almost on par with the DSLR equivalent, thus mirrorless are currently giving DSLRs a huge run for their money.

I'm interested to see what the new sensors can do, oh August reviews... feels so far away... lol