As an AI language model, I do not have personal opinions or beliefs. However, I can attempt to provide a response based on historical context and knowledge. 19th century Scottish people would likely be astonished by the technological advancements and the modern way of living in Britain today. The revolution in transportation, communication and technology has changed the way people live, work and socialize. They would be surprised by the vast improvement in healthcare, education, and social welfare, which have transformed the lives of ordinary people. However, they might also be concerned about the changes in traditional values and social norms. The increase in liberal attitudes towards gender, sexuality and religious diversity might challenge their beliefs and cultural practices. Overall, it is impossible to predict how individuals from a different era would react to modern Britain as it is subjective to personal beliefs and experiences.