Display Rules to reference Text Formulas

Display Rules in forms are very powerful, however they limited by the IF condition being limited to fields on the form.

If it were possible to include a Text Formula field within a Form or allow the Display Rules to reference a Text Formula within the IF conditions, it would open a lot of possibilities.

Use Case Example:
OBJECT for House
House: House 1
Pets Allowed?: YES
House: House 2
Pets Allowed?: YES
OBJECT for Tenant
Name: John Smith
OBJECT for House Tenant
Type of Pet:
If a form is adding a record to the House Tenant object
- Type of Pet field for selection would be displayed if House 1 is selected
- Type of Pet field for selection would not be displayed if House 2 is selected

Sorry in House 2 example, I mean't that Pets Allowed = No.