Using the proper language is the key. If you are going to use your trademark on virtual goods, many use “Downloadable virtual goods, namely, [INSERT YOUR SPECIFIC GOODS HERE], for use online and in virtual worlds.”
Alternatively, if you will be providing virtual retail store services or maybe just entertainment services many use:
“Retail store services featuring virtual goods, namely, [INSERT YOUR SPECIFIC GOODS HERE].” or
Entertainment services, namely, providing on-line, non-downloadable virtual [INSERT YOUR SPECIFIC GOODS or SERVICES HERE] for use in virtual environments.