Comment by hadlock
Had the iPad not launched immediately opposite it, I can envision a world where HP goes through two or three revisions and has a solid device with it's own "personality" much like how Microsoft has their "Surface" line of glued-together tablets and "laptops" which sorta compete with the iPad and Macbook Air even if they hardly market them. The fact that Microsoft eventually succeeded in the space seems to indicate HP could have as well. I can see the business case where the new CEO isn't interested in rubber stamping a new product line that's going to lose money for him every quarter for the next three years against the glowing sun that is the iPad. There are better ways to burn political capital as a C level.
The thing with Windows tablets and Android tablets is in both cases the software development only has to justify its net increase in spend over just doing phone apps, but since HP didn't have a good market of phone apps to begin with, they'd basically need to justify the entire software development cost, on lower sales.