Big watches are definitely IN. However, they will remain acceptable for all people on a go forward basis.
What I mean is this... In the past, big watches were "weird" and "silly" and so on. Now they are "hip" and "chic".
Certainly, small watches will make a comeback at some point, but when they do, it will not make big watches unfashionable or uncool.
Big watches have now found a permanent niche in the watch world, and while it will ebb and flow in terms of popularty, it will not fade away.
Even Rolex is creating 43mm watches, because they have come to realize that there is a constant and stable market for larger watches.
Again, it might not always be so big a segment, but it will be constant.
This is my opinion after 2-3 years of discussing with industry folks, experts, trendsetters, etc.
Rolex is not prone to trends. They would simply not create a watch to meet a trendy demand. This to me, and many others, suggests a regularity.
I expect big watches will be forever in-style now, so long as the individual wearing them is comfortable in them.