Technology intrudes into the lesson or becomes the activity itself, e.g., teaching students how to use a spreadsheet. If students hate to write, they will hate to write as much using a computer as they do without it. The activity must be engage and motivate. Activity is interesting and engaging for the target population. It is fun, even goofy enough to motivate students to do whatever it takes to accomplish it and would want to do it again.
Activity is reasonably different from students' normal classroom activities.
Students are motivated to try the activity. The activity is dry and boring. Technology cannot make a bad activity good or a boring activity exciting. The activity itself must be imaginative, thoughtful, and creative. But the lesson should be at least as easy and worthwhile with it as it is without it.