Although the mentioned release is for the PC, I'd say this has a major impact on another realm: mobile devices. I'd even go so far to speculate that this is one of the main reasons for implementing H.264 (the blog just says "our customers want it").
In most mobile standards (e.g. 3GPP, DVB), and also for IPTV, H.264 is the required video codec. So unless an environment can support it, one way or the other, it is not relevant for implementing services with it. This was a drawback of Flash in the past, I reckon it's now back in the race. With H.264 and AAC capabilities, it is possible to implement mobile (video/TV) clients. And: as Flash is supported on many different devices, you can use it to offer a service that is available on PCs, mobile devices (phone, PDA), set top boxes, ... (a.k.a. converged services)
Took Adobe a while to realize that without H.264 the road will be rocky, no matter how good their supported video codec is, just because it's not in the standards.