I don't really follow; your example's not clear. HTML5 is a standard, regardless of when the <canvas> element was first standardized, or even implemented. It's

I don't really follow; your example's not clear. HTML5 is a standard, regardless of when the <canvas> element was first standardized, or even implemented. It's much less a buzzword than it is a set of specs which let HTML documents convey more semantic information, which in turns has implications for e.g. accessibility, among others.