Pentax will show, under glass only, 2 new DSLR models to be released at a future date. One of which will of course be a flagship and the other a mid-level body.
There will be lots of ooh's and ah's, but we will have to wait until 3rd quarter to see them on the shelves, possibly even 4th quarter.
My fearless speculation: They will release a reworked version of the 645D, and show (maybe under glass) a new model, significantly more advanced than the K20D, scheduled for release in a few months. Later this year, they will announce a K20D+K200D replacement, which will have at least the specs of the K20D, but in a more compact body and with some stuff to attract newbies (better LV, video mode and scene modes).
I think no dSLR/dSLR lens will be announced I hope I'm mistaken. Anyway, I don't havo any intent to buy anything else this year (maybe only a very cheap silicon cell light meter and some more B&W films and developers ).