We just recently bought a LG 4k UltraHD , or what ever it's called , although I don't think any of our cable channels actually broadcast in 4K , and other then that , you have to actually have a 4K player and 4K disks , to take advantage of it , which we don't
But yea , we've slowly been converting our older DVD's and Blu Rays over to VUDU , Just did all the LOTR and Hobbit extended versions last night as a matter of fact
Have to admit , smart TV's are pretty cool , can watch any of my movies with a simple click of the button , don't even have to get out of my chair