HDMI output (1920x1080) HD for high definition multi-channel live viewing only. 1080p recording resolution is limited to a maximum of 1920x1080 per channel. Image quality and resolution is dependent on the type of camera connected to the DVR.
Neon can last decades. In practical terms the normal expected life span is between 8 to 15 years. Neon can be repaired and recharged as long as the tubing is not cracked/broken.
Of course the answer is, it depends. Smaller signal tubes, such as the 6DJ8 are rated to last about 5,000 hours and the more durable versions will last incrementally longer. An output tube is typically thought to last 2,000 hours, but then you are talking about using them to drive speakers. When used in a headphone amp, such as the EL-34 in the ASL MG Head, the demands will not be so great, as when driving speakers, so they should last longer.