Helpful chart for choosing TV size/resolution

[ImStylinOnYaBro]

i currently have a 1080p 40" class samsung , i believe at 60 hz. I want to upgrade to a 55 inch class led samsung 1080p at 120 hz. I have been wondering, with the larger screen size, can't yoiu notice a difference in detail when your up close, say you sit 5 feet away for the 40" what if i sit 5 feet away for the 55" will i notice less detail because hte same resolution is on a larger screen? The reason I ask is because that is the max distance i can sit from the tv w/ my current room setup;