Joshua Topolsky interviews them for The Verge about how HP will be using webOS in the future. The interview is played as Whitman confirming that new webOS tablets will be coming, but read the actual transcript:

In the near term what I would imagine – and this could change, in full disclosure – is I would think tablets, I do not believe we will be in the smartphone business again.

Then she was asked if tablets are a “real possibility”, to which the response was “yes”.

HP has flip flopped on just about every move they have made, so I would think anything is a “real possibility” with HP right now. The bottom line though: HP open sourced webOS in order to cut development costs — given that I don’t see a full commitment to the OS for hardware development.