I can't speak towards what it really means, so just going on face value, WYY considers Wave the expert in provisioning TPMs in a MS environment, any MS environment (PCs, tablets, phones). recognizing that MS is not the leading player in the latter two, it seems mostly as a PC solution to them although I could imagine Surface could do well with WYYs clients. There is a bit of a contradiction in the response - on one hand it indicates legacy platforms, on the other hand it seems to reference MS tablets and MS mobiles which generally speaking do not represent a legacy space. To the extent that the arrangement involves Wave selling what Wave has now, it would likely be mostly to the legacy space it would seem.
Wave did / does have things going on with Samsung leveraging the android platform (as I recall e.g. the Galaxy tab) but on the face of it WYY was either minimizing Wave given the tone of the question (why are you hooking up with these bums) or more likely that as it currently stands the arrangement is to afford access to legacy TPMs via Wave's CSP capabilities.
The above content is my opinion.