Is the convince of a laptop enough to buy one?

I'm very happy with my desktop but sometimes I hate having to go to my room to use it. If I'm in the kitchen or living room or outside sometimes I'd like to check out stuff like recipes, celebrity names or a mysterious bug or plant. But I'd have to go in my room to do it. I don't want to sound lazy but a laptop would be good for these types of moments. But is that good enough reason to buy one? I don't care about harddrive size or downloading pictures and songs or any of that other stuff because I'm basically only going to use it for research or to talk on social networks and forums (the same as a desktop).