There was once a widespread belief in the security industry that held something like this: Stick to what you know best; focus on your core competency - burglar and fire alarm systems - and you will be more likely to succeed.
Virtually no one says that anymore. Today if your firm is making a profit installing alarms and intercoms and home automation systems and central vacuums, you're likely to be asked to speak to your peers at an ISC show about your business plans.