Tiffany's is coming out with a line of engagement rings for men. I'm sure other jewelers will follow suit.
How do I feel? Why not!?
It's a nice way of showing commitment, and if it's good enough for one half of the couple, it should be good for the other.
Would I wear one? Tough call. I don't like jewelry. I wear a watch, but only on work days. Upon maternal insistence, I got a high school graduation ring. I wore it once-- the night I graduated. It's been in the box ever since. I knew I would never wear it, and graduating from high school was no major accomplishment. I thought the whole ring thing was silly, but I fell victim to convention. I did get a chuckle out of my best friend on graduation night. He loved his ring, and, of course, forgot to wear it to the ceremony.
College was a much more meaningful accomplishment. I didn't buy a ring. See paragraph above. I knew I would never wear it.
There is no engagement on my horizon, so a new ring is a moot point. I do give a lot of credit to Tiffany's for finding a new source of revenue.