Perform Workflow Task Items in System Emails
A fantastic functionality would be for recipients of workflow task emails to be able to select an option for that task directly from the system's email. Many users are able to receive and respond to emails even though it could quite some time before they're able to access a computer. In a large environment having all required users install the mobile app isn't always practical and with table fields being part of many workflows the mobile app is out anyways.
Daniel Shemanski commented
Effectuating a Task straight from an E-mail would be an enhancement I feel would be beneficial to myself as a user.