With the series being over 20 years old and relying on the same format, now would be a perfect time to shake things up rather than leaving players bored while they wait for their Sims to return from work.
There could also be mini-games that determine your Sims performance in their job.
It would be great to see every career be interactive, possibly through performing tasks associated with the job, such as a firefighter putting out fires or a business person making financial decisions for a company.