Sometimes it's a fine line we walk between the joy of cycling and feeding the desire to improve. Cyclocomputers and GPS and HRM and power meters can help us in our quest to improve (or not get lost), but can also rub the joy right out of cycling. Heck, sometimes getting lost can enhance the enjoyment of a leisurely day on the bike. On the other hand, setting, working toward, and achieving a goal can be extremely rewarding. Electronics can help that happen.
I think unplugged rides are great fun. Instrumented rides can be fun, in a different way.