Skype keeps acting more and more like a real phone company (read telco) with the ability to now display Caller ID in North America.
With this move Skype continues to pass the “duck test.”
While you can also opt to display your mobile phone number, I think it’s far better to use your Skype number and forward it to wherever you want using Skype Out and get the Unlimited Plan. You have more control, especially if you use multiple phone numbers or travel Internationally as you can take greater advantage of Skype’s low calling rates.