I've often wondered why shops, etc don't upgrade their CCTV cameras to a decent HD quality.
The systems are out there and they're rapidly becoming cheaper - they really are quite a lot better than they used to be.
I got our first CCTV system for our house, roughly 2 years ago - 4 HD cameras (1.3 MP), 1 TB hard drive ... plus all the necessary leads etc - all for roughly £130 - BARGAIN .... and the playback is quite good, although the night vision quality is not that good.
I often wonder what's the point in having CCTV, if you can't identify people in the footage who may be committing a crime of some sort - maybe shops and businesses don't realise just how bad their systems are and just how cheap the newer, better systems are??