Threat - the proportion of people available to work (those aged 16-65) is falling. If businesses can't find enough workers to fill all their vacancies, it'll make growth difficult.
Opportunity - the market size for firms such as private healthcare providers will increase. Retired people often travel a lot—so it's good news for holiday companies too.
Demographic changes influencing business decisions
More working parents will boost the workforce, but businesses might need to provide flexible contracts
An increase in single-occupancy households increases the demand for smaller houses and for food packaged in smaller amounts
An increase in senior citizens might prompt a business (e.g. a cinema or a hairdressers) to offer special rates during weekdays, when other people are working
Changes in consumer lifestyle and buying behaviour
Consumers now use the internet to research products before buying them. Companies often send products to relevant bloggers to review online. This gives them cheap, long-lasting promotion
An increase in online social networking means this is an important means of promotion
Customers increasingly buy things online but are too busy to wait in for deliveries. So some companies use delivery services which drop off parcels at convenient locations (e.g. petrol stations) from which the customer collects them
Increased use of tablets and smartphones means not everyone wants physical products. E.g. the Camping and Caravanning Club offers a cheaper 'online membership'. Members get access to the magazines online, rather than receiving printed copies. This saves the business and the customer money and reduces environmental impact
New markets with concentrated demand-businesses might focus on their distribution networks in these areas at the expense of their wider distribution network
Infrastructure, housing and communication technology will be needed, so there will be lots of opportunities for new and existing businesses to expand into these industries
People have access to a higher level of education, so the workforce becomes more skilled-businesses might move certain departments (e.g. finance) to these areas to take advantage of the labour supply
When there is a shortage of labour, businesses struggle to grow. Migrants can help some businesses overcome labour shortages and allow them to expand into new and current markets
Migrants can create demand for certain products which creates new markets for businesses to move into, e.g. a mobile phone operator might offer cheaper international calls to expand its market share
If too many skilled people emigrate from a country, it can cause a 'brain drain'. Businesses in that country will struggle to get skilled workers which, in the worst case, will force them to shut down
The expectation of CSR puts small businesses at a disadvantage as they are less likely to have funds for CSR projects or to employ someone to organise CSR activities