1. The establishment of Britain as the dominant colonial power for almost 200 years.
2. Britain becoming the largest power in North America, which had important consequences as it meant the American colonists no longer had to fear French or Spanish invasion and so they felt they needed Britain less, which increased the inclination towards independence. Had France won the SYW then the American colonies might have stayed with Britain for a lot longer.
3. France helped the Americans partly to get revenge for losing the SYW. Without French help America may well have lost its struggle for independence, thus keeping the colonies in the British Empire well into the 19thc. The US may even never has developed into republic. It could have developed, like Canada or Australia, into a dominion and then independent member of the commonwealth!
4. The war also increased Prussia at the expense of Austria, which later feeds into the dominance of Prussia in the German world in the late 19thC, and indirectly into the causes of both WW1 and WW11.
5. It weakened French power and royalty in way that fed into both the French revolution and the rise of Napoleon.
6. It was the first major war in which a genuinely united United Kingdom took part. Scotland and England had there last war only 11 years before the SYW started. So that some Scottish and English soldiers fighting against each other in 1745 may well have been fighting side by side in 1756.
Quite a conflict then!