Fly both airlines. Not sure how you say Alaska isn't innovative. They have Wifi and outlets on every plane i've flown. Also have paperless tickets. These are the innovations business travelers want. Other airlines its hit or miss.
Paperless tickets.. really? That's so 10 (20?) years ago.
http://www.businesstravelnews.com/Business-Globalization/SAS...
Since VX has had those exact same amenities plus additional others for longer, and AS is not going to keep the Airbuses around...from the perspective of a Virgin flyer, Alaskan wouldn't seem that innovative.