Availability of necessary images, software packages, etc. Fast enough computers and laptops to eliminate dead time. Network connections if needed to access software or remotely-running calculations or simulations. Handouts for students can be made easily or simply published in electronic form. Materials can be updated more easily.
Color is more interesting and more consistent with student expectations.
Software can provide intelligence amplification in the classroom. For this approach to be seamless, a professor should come to class and find everything that is needed already set up, whether on a laptop or a stationary computer. For courses that use computers regularly, classrooms should have stationary computers with LAN connections for access to standard applications. Non-standard applications should be loaded by the support staff for the LAN, on request. These classrooms should be supplemented by a pool of laptops with good portable projection equipment, and classrooms with a network connection for the instructor.