I think that is a safe bet. It seems that cat5e/cat6 etc is going to be with us for a long time. It might eventually be replaced by fiber or some other future technology, but that is still a long way off.
Also, with all the different baluns being produced for cat5e wire, you can use it to distribute a great variety of things. So I would consider it a great "catch all" for any wiring scheme.
That being said, good quality baluns are generally more expensive than simply running the correct type of wire in the first place. So if you know you are going to want to distribute component video around the house immediately, then I would suggest running enough precision coaxial cable to each TV location and equipment location instead of using a couple cat5e wires and baluns. (I would still suggest running cat5e for the future as well). So you might want to run 5 or 6 precision coaxial wires, 2 RG-6 and 3-4 cat5e wires to each TV location. If you plan on having any video/audio devices at that location (like a VD player), then add more precision coaxial and cat5e wires, etc, etc, etc.
But if you don't plan on distributing component video, then you don't have to run it. But I would run at least 2 cat5e wires to use to distribute it in the future. So I would run 2 RG-6 and 5-6 cat5e wires instead, etc, etc, etc.
Hopefully that makes sense. Of course this is all just my opinion. You'll have to plan out what you think your needs will be. Unfortunately there is no "standard answer" that works for everyone. Well, perhaps "Run more wire than you think", but that doesn't really help.