Here is some interesting information from the most recent HP annual report. The combined PC/Printing group had sales of $55.9B for the most recent fiscal year. Printing makes up 43% of the sales BUT sales growth from the previous year was only 2.6% compared to 10.2% for the PC group.
HP state, "In Printing, we are experiencing the impact of the growth in mobility, weak consumer demand,
weak demand in EMEA (Europe, Middle East & Africa) and a competitive pricing environment. To be successful in addressing
these challenges, we need to execute on our key initiatives of focusing on products targeted at
high usage categories, developing emerging market opportunities, and introducing new revenue
delivery models to consumer customers."
Printing net revenue decreased by 6.5% over the previous year. Though there was a large decrease in the Ink Jet segment, it was partially offset by a higher mix of high value ink jet units (not clear to me what they are talking about here as there is no elaboration; perhaps these are the large units used by graphic arts and printing industries. I'm not familiar enough to make any further statement here).
HP do not break out R&D expenditures per business segment so it's unclear what the spending is for the Printing group.