I moved this to the Ask Festool section of the forum since members wouldn't know the answer to this question.
Festool plans to continue to expand its cordless tool offerings, but as far as I know there are no immediate plans for other cordless tools that will use the same battery platform as the CXS. We have standardized on the battery packs used by all other cordless drills offered since 2005 (I believe is the year). Obviously, for a small form factor drill we have to divert from that format and I expect it's an exception.