For watching Netflix, not really. IIRC the best resolution you can get with Netflix is 1080p through a laptop (and only 720p with Chrome) so you might not even notice much of a difference in picture quality. The larger screen would likely be a nice upgrade.
That said, do keep in mind the 2011 15 and 17 inch MacBook Pros are ticking GPU time bombs. If the GPU on the 2011 has not already failed, it will. If it just had a new logic board installed, that one will fail. The options are disabling the GPU permanently to force the system to always use integrated graphics, replacing the logic board with another faulty logic board, or putting components of the computer in your oven (with very mixed results).