The info which is spreading now happens to be the info I made available about a year ago:
https://www.pentaxforums.com/forums/pentax-news-rumors/129409-forthcoming-pen...ss-camera.html
At that time, sources actually hinted at mirrorless with the K mount but I found it safer to say, with K mount support.
It seems, a year old project was put on hold and resurrected by Ricoh after the take over. CP+ seems like a reasonable release date then. As is the reuse of K-5 tech (LCD and sensor).
If the Pentax mirrorless turns out to be K mount indeed, then this has a number of pro and cons:
+ compatibility and only mirrorless company committed to protect investments into lenses.
+ retractable lenses for wide angle and transportability are feasible.
+ a future full frame mirrirless is feasible.
+ SLR-like ergonomics because not too small.
- Relatively large and heavy body for a mirrorless.
- No adapters for other vendors (Leica M etc.)
o SR?
A K-x is 63.5mm deep (mount to LCD), a K01 is claimed to be 59 mm or 4.5mm less. Removing the SR daughterboard would free up more space so I guess they maintained the sensor shift SR and succeeded to squezze another 4mm from the stuff found between sensor and LCD.
Note that the K01 as described here would fit very well into Hoya's old management style:
1. As little as possible R&D (take a K-x or K-7 body, remove the mirror (probably K-7 because the K-7 decouples shutter and mirror), replace the focus screen by an EVF screen and make the VF an EVF.
2. Limited risk because no new mount needs to be marketed. Therefore I guess that Hoya did not have new retractable lens designs in mind ...
3. Can replace entry level SLRs because buyers can still upgrade to the more expensive SLR line.
Everything combined, today's rumor appears plausible to me.