when you edit there's an option under the video preview window (Full, 1/2, 1/4, 1/8 etc). it's the resolution for the video playback, so if you have it at "FULL" with 4K footage it may run slow. I have a mid 2012 15" and with 4K footage from a RED camera..playback is really slow, so i'd have to scale it down to 1/8. I just tested to see how my laptop would perform but in a proper editing workflow i normally convert RAW files to Apple ProRes 422LT, for offline editing.
sorry just read your post again. I assume you will do video editing for personal? What editing program will you use? Either way you will be fine, especially if you are not editing for professional purposes.