Doesn’t that require hardware designed to decode it?
The actual number of possibilities pertinent to this discussion are two:
1) iOs updates to 7.1 before SWSX
2) iOS doesn’t update to 7.1 before SWSX.
There is a 100% chance that iOS will update to iOs 7.1 at some stage, as it is in Beta.
March would historically be a fairly long time, for a point update, since the release of iOS 7.0.
Then there is the insider reputation of John Gruber, which is fairly considerable. So given the binary possibilities I would say it is a good deal higher than 50% that there will be a release at or before SWSX.
Hey, I'm just being pedantic. Of course, it's highly likely that Apple will go with one of the two options you stated; just not actually 100%.