There was attention on race in Morrowind, too. Nobody mentioned Nerevar's race in Oblivion. Because it's irrelevant to Cyrodiil.
And the Dragonborn's race will be irrelevant to whatever's next.
In previous games the race was irrelevant, but in an increasingly polarised setting the players actions and origins possibly have the biggest impact of any previous hero. In Oblivion for example, irrespective of a player's choices they essentially support the imperial cause with no significant branches.
In Skyrim, the ultimate outcome includes:
- Are the blades reformed, or disbanded?
- Do dragons return and integrate themselves with tamriel, or are they consigned to the history books once more?
- Is skyrim ultimately controlled by the imperials or the nords?
- If the dragonborn does follow the path of tiber septim and lead a faction to victory, who will they represent? - An alliance including free-skyrim, the cyrodillic empire, the aldmeri dominion or will they carve out a new empire with their own species at the reigns of command?
A loyalist khajiit for example will bring about a VERy different outcome to an Argonian or an imperial