Friends, Romans - country men (by which refer to all countries where like minded individuals reside) don't forget that we are up now to CAT 8 (almost - but likely to be different connector and not backward compatible) and CAT7, bright green colour favoured, is common. Don't be fooled though because the transmission standard for CAT6 (10GBase-T) means CAT7 will be no faster. It has the advantage, while being a bit more costly, in that the shielding is better - you can run it more intertwined with other cables and get away with it, fewer lost packets, and it has a larger copper cross section this allowing the PoE to work a bit harder. If installing now the lowest standard should probably be CAT6 (or 6a) which has 1Gbs data performance (CAT 5 is 10Mbs (5a 100Mbs)) so 10 times a quick as CAT 5. Also in your discussion above remember that switches (true switches) allow you to set them up with different QoS (Quality of Service) offerings to the various stations on the network. In this way you can give the PS4 gamers a better connection, less latency / contention / speed to WAN at least around the house, than the iPad browser. As things stand cabled connections will be faster than WiFi and QoS over wifi is a bit more of a dark art. If you have a larger home then consider pulling through some fibre connections, packet loss immune but limited to 10GBase-T speeds if using converters - if your router / switch has fibre ports these will be faster, between switches and fan out in CAT6/7 from there.
Finally in what might be helpful to others of our vintage, me not you, its worth recounting, as you pull though your CAT7 cable to your sons bedroom for his PS4 / XBOX and stretch every sinew to give him a great connection, that our son moved out of home to get a faster broadband connection - result (but don't tell his mum I said so)!