I do lots of glass floats even though I use non glare acrylic sheeting on the back because it hides the dust that forms on the back of the framed picture, it blurs the wall and doesn't condense as much as glass.
I like the look because sometimes finding a mat board, even fabric that looks good with the object or art just can't be done and the blurred wall is the matting. The floating is dramatic and eye catching.
I used to always have a sample in the shop and with the art and mats floated in an acrylic box. The mats had inside and outside bevels, each one was spaced up with foam board and they didn't touch the art at all. Very dramatic look. I sold a lot of the framed samples and took orders for others.
When I wanted a frame I found that using a metal frame (Nielsen of course) for the moulding in glass floats worked because I didn't have to finish the back. Corner ornaments really make them look nice from the front and the back.
Each framer finds a style they like and can sometimes get in a rut, Trying something a little different encourages our customers to also try something different.
On my website I have some instructions on how to do a glass float. Look under framing papers, glass float. It's a PDF and can be downloaded and printed out.
I know some people don't like glass floats, but I make a lot of money with them and sure see nothing wrong with that,