I found this on a helpful website which gives me more confidence:
"Q: Will Microsoft cease requiring XP users to activate Windows XP as of April 8, 2014, since support for the product is ending?
A: No. A spokesperson confirmed that activations will still be required for retail installations of Windows XP post April 8. "Windows XP can still be installed and activated after end of support on April 8," the spokesperson noted. "Computers running Windows XP will still work, they just won’t receive any new security updates. Support of Windows XP ends on April 8, 2014, regardless of when you install the OS."
Another update (January 15): For those asking in comments below, Microsoft will continue to make all patches and fixes made to Windows XP up until April 8, 2014, available to users via Windows Update. "There are no current plans to remove existing Windows XP security updates from Windows Update after end of support on April 8, 2014," a spokesperson confirmed."