Maybe?
Well, from what I've read, it can help to a certain extent. Nonablative laser resurfacing does significantly reduce stretch mark appearance (according to one study it worked for 90% of patients), but doesn't do much else. There's one laser tightening procedure called Titan which seems to reduce sagging and wrinkling of skin, but it isn't by any means a cure. Here's the link for it, by the way. I don't know if the procedure is worth it, as it seems to only work a little bit and costs between $500 and $2500. I wish there was something that really worked though!