At least, if Aston Villa wins this match then yes, at least for a while Aston Villa will be at the top of the Premier League table. But the point is, Aston Villa can certainly win in this match and thus, then of course the competition in the title race will be a tight competition this season.
There is a huge chance of this happening and it would certainly be a different sight if in the end in the middle of the season a seemingly ordinary club like Aston Villa managed to take over at the top of the EPL standings even though this was only temporary.
Facing Sheffield with poor performance and an equally bad defense line makes Aston Villa should be more confident because with other matches that bring together Liverpool and Arsenal, indirectly whatever results will be obtained in the match, Aston Villa will benefit greatly.
If in the end the match ends in a draw then Aston Villa will be at the top a little longer (if they win against Sheffiled) but if one of Liverpool or Arsenal wins in the match that is done it also does not interfere with Aston Villa's advantage because they will definitely be in second place if they win or draw so this is a very good opportunity for Emery to further make Aston Villa's wings fly.