There will certainly be some changes given the pressure form the UK obviously increasing, I don't think there is any real nationalism here at all to be honest. The vast majority is happy to buy goods that are not manx (not to say that we shouldn't support the local trade because I think we should)
People might be a bit put off coming here because of the recent events, Vat and health agreement but I think its up to the government to see to it that the relationship is kept well and make new agreements with the UK to arrange the present perception.