As you see written in the spec, it was on the track to W3 Recommendation, but as every vendor who implemented it chose SQLite, there was little to do about it.
In other words, it isn't a "kill", just end of active maintainence. But spec as it is, is pretty solid. And WebSQL is here to stay in WebKit - there are just too many apps dependent on it to kill it. And no good reason to kill as there's no viable alternative on the horizon.
Summing up - WebKit (so iOS, Android and others) has it and will have it for quite a while, IE won't, FF won't too.
As you see written in the spec, it was on the track to W3 Recommendation, but as every vendor who implemented it chose SQLite, there was little to do about it.
In other words, it isn't a "kill", just end of active maintainence. But spec as it is, is pretty solid. And WebSQL is here to stay in WebKit - there are just too many apps dependent on it to kill it. And no good reason to kill as there's no viable alternative on the horizon.
Summing up - WebKit (so iOS, Android and others) has it and will have it for quite a while, IE won't, FF won't too.