If you going to start deep diving into what it can do vs what it was sold has then you can pick apart PS2, PS3 and the PSP.
In Australia for example, when the PS2 come out, it was the cheapest DVD player. Dedicated DVD players at the time cost an extra $200-$300. Lots of people doubled up for their parents an got them the PS2 so they could watch DVDs only.
PS3 was marketed as the cheapest BluRay player on the market. It was half the cost of a BluRay player when they first come out and if you bought a fancy high end high price Sony TV at the time they even threw in a PS3 for free as a BluRay player.
PSP for most was a media player on the go that let you listen to music and watch stuff on it. The iPhone killed it, hence why PSP Vita didn't do as well even thought as a gaming console it FAR exceeds the PSP. The extra benefits the PSP provided were no longer a selling point when your smart phone did all that and more.
At the end of the day I consider these gaming consoles as that was the main intent even though Sony provided an avenue for others to use their system for other purposes that don't relate to gaming
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