Hi. I don't think either are trending. I believe it's more a matter of taste and lifestyle. Glass tops are a bit more high maintenance as you see smudges much more easily.

Price is not a function of design. It depends on the finish n material. You should specify what your budget for a stone top dining table set is.

Hi, Obviously folding is space saving which works well in two situations, when you have a small space and when you don't have much guests at house. I think if designed well and customized than than folding can be as comfortable as the conventional.

Make a partition perpendicular to the tv unit wall and u can place the dinning table at that side.attached here is the photo of the same