Because of all the manufacturer/model-unique screens on a laptop computer, color is a big issue. What looks good on the laptop may or may not look good when viewed on another computer or even when printed. BUT...buying an external monitor and plugging THAT into the laptop will solve the problem.
Perhaps an even bigger issue with laptops is their limited hard drive storage capacity. While some of the higher-end laptops sport a decent size hard drive, after 6 months, maybe even more than a year, you'll be running out of space due to the ever increasing size of the pictures produced by ever increasing megapixel cameras. One solution is to get a USB external hard drive for your photo storage, but it should also be backed up to yet another USB hard drive, just in case the first one goes bad...and they DO.
While laptops can do close to everything that a desktop computer can do, and be portable as well, there are some instances where they fall short. In my estimation, picture editing and storage is one of those shortcomings.