ADSL is the connection to the ISP. It simply provides your Internet connection and does not distinguish between Ethernet or WiFi connected devices.
Most Home Hubs provide 4 Ethernet ports to connect to devices. (The original HH1 provided only 2 Ethernet ports. I cannot remember whether the HH3 provides 3 or 4 device Ethernet ports.)
All Home Hubs support an ADSL ISP connection.
The HH3, 4 and 5 also have an extra port to connect to an external VDSL modem for use with FTTC (Fibre To The [street] Cabinet) although the HH5 has an integrated VDSL modem.
The HH4 has just one Gigabit Ethernet device port and three 100 Megabit ports. The HH5 has four Gigabit ports.
HH4 and HH5 support WiFi on both 2.4 GHz and 5 GHz. The earlier Home Hube only offered 2.4 GHz WiFi.
You can connect devices to the Ethernet ports and to the WiFi networks on the bands that the Home Hub supports. You can use all these connections at the same time, although there is no advantage in trying to use more than one connection to any specific device.
Use Ethernet for your performance critical devices such as your PS4 and other devices that are not portable and are used for online gaming.
Use WiFi for portable devices, devices that are not speed critical or do not have Ethernet capability.
The total Internet traffic will be limited to the speed of the ISP connection. As WiFi is shared between all the devices using it, if there are a lot of WiFi connected devices they will each tend to experience a slower connection than an Ethernet connected device. However, providing all the devices together do not reach the ISP (ADSL) speed, then you should not have a problem.
I hope this helps.