The reality is we now live in a high definition world. More and more companies (and home owners) are upgrading existing CCTV systems for IP. Eventually IP CCTV will be the standard for CCTV installation. The technology is changing so quickly that there is always a newer and better option six months later in for both analog and IP products. However, IP will provide you with a longer term solution.
You may see high definition CCTV called HD (high definition), IP, MP (megapixel) or network CCTV. They all refer to the same CCTV technology. This technology offers high resolution recording and playback of security footage on a network system.