I suppose it is a bit interesting that "traditional" digital cameras have plateaued somewhat. All those pundits that say that Pentax is doomed or whatever, based on what some other manufacturers just happen to be doing in the last one or two years, really don't have any better of a clue where the industry will be 5 years from now, let alone 10 or 20 years.
There is a lot of crap about certain recent mirrorless cameras being more innovative, but this overlooks the fact that this has nothing to do with the actual mirrorless aspect of the cameras, and whatever technology gains are there can be applied to any cameras from any manufacturer, if the manufacturer wants to (allowing for patents and licensing agreements). Sometimes people forget that mirrorless cameras are just DSLRs with fewer features. Brand X has better video codecs and 4k, well boo hoo, I'd like to have that too, but that doesn't suddenly make my whole system less capable.
In the meantime, I have my battery grip for the K-5, so I can use AA's, so I can keep on shooting even if the world's supply of D-LI90's goes away. That's not being too paranoid, eh?