I am sure it will happen, although Real Madrid still has the opportunity to defend the title but now we can see how the strength and consistency shown by Barcelona makes their percentage to win the La Liga title this season quite large especially since Real Madrid throughout this season has been very inconsistent so that it can be utilized by Barcelona.
If we talk about eligibility, of course Barcelona deserves to win the La Liga title this season, they have shown extraordinary performance which is much better than last season.
In terms of eligibility, it is quite obvious that Barcelona deserves to be the champion in La Liga this season, but we also need to see that Real Madrid's chances of getting it have not disappeared at this time. Because we also don't know what will happen in the rest of this season to Barcelona so Real Madrid only needs to beat Barcelona when they meet again in a match in La Liga this season. Although Real Madrid still has to hope that Barcelona does not get full points when competing with other opponents.
Everything can happen. But at this stage of the season Barcelona are doing great in Laliga while Real Madrid are not in their best form. I understand Real Madrid will want to do everything possible to win the league title this season but not with this performance they need to do better than this, Barcelona in the other hand need more points, to secure their top spot in the standing. I think that is when we can give Barcelona enough hope of getting the league title, since they are sharing the same point with Madrid. They need to win more matches to make go well for them.