Water on Mars

Sub-surface water found of Mars.
Why is it important?

1. Enhances chances of life on mars
2. Water can be used as fuel rocket fuel for return journey or going beyond Mars
1. Oxygen can be seperated form water
3. Jouney to Mars would become logistically easier and significantly cheaper
4. Lighter rockets with more scientific tools can be sent (as wieght of fuel would be lesser)
5. Colonisation by man in future