I have moved on to Digital installs to avoid any blu-ray read issues. I personally dont see the point in disks now, especially when most big AAA titles will have a pre-load leading up to release day. I don't believe in 'Trading in' games as the developer sees no financial gain out of the resell; only the retailer gains profit against the cash/credit they give for the item on return.
Shawrey.
Cost is a pretty major point, it's nearly always considerably cheaper to buy new releases on a disc and that isn't going to change any time soon.