Does not do sous vide, but it certainly can replace your rice cooker and slow cooker. Only trouble is having only one appliance prevents you from cooking parallel (making curry _and_ the rice to serve it over, for instance, would be a problem).
Not purpose built for sous vide but the keep warm setting hovers ~70C which is nice for well cooked but still moist chicken. I believe the smart model has adjustable keep warm settings and is more fit to purpose for sous vide. Instant pot also sell an affordable immersion circulator.