I have a disclaimer, I do wear my watch during Mass and on the right wrist because years ago I developed a rash under the watch on my left wrist.
But prior to Vatican II, it was the custom to remove one's watch to celebrate Mass so that nothing would distract from the elevations and at other times during the Mass.
Today even modern popes wear their watch during Mass, I think beginning with St. Pope John Paul II and continuing with Pope Benedict and now Pope Francis (unfortunately Pope Francis even looks at his watch during Mass, ugh!).
The other thing I don't like, and never have done is wear a ring since becoming a priest. I think only a bishop should wear a ring and certainly no priest should every wear rings during the celebration of the Mass! How tacky!
But with that said, is Bishop Conley's watch a distraction?