What is the difference between the old games consoles and the new games consoles

The answer is quite simple. The difference between the old games consoles and the new games consoles is not only the modelling of the either games consoles but the functional properties and the way it operates.
Old games consoles are the consoles that were manufactured back in the year 1978 onwards. You'd recall consoles such as SNES (Super Nintendo Entertainment system), SEGA 16-bit console, PlayStation 1 and a whole lot of other old games consoles. It was these game consoles that world-famous characters such as the Mario Bros., Sonic & Knuckles (from Sega), Tetris and a whole lot of others.
However, the gameplay of the old gmaes consoles only features in 2-D mode, and the graphics/bit-rate is not as substnatial or detailed to the newer consoels.
The newer models, such as the Nintendo 64, PlayStation 2, Nintendo Gamecube and the Xbox starts to introduces 3-D gameplaying. The bit-rate are substantial in quantity, sois the quality of the graphics and the style of playing. They are, what you'd call as of now, the 2 generation of games consoles.
The 3rd generation gaming consoles are ones such as the new Wii from Nintendo, The PS3 from Sony and Xbox 360 from Microsoft. They are, as of right now, the ultimate in revolutionary games consoles. From the first generation games consoles and the second generation, the controllers contained wires. But the revolutionary games consoles have wireless controllers, thus preventing controllers and other wires becoming tangles and possible breakage.
If you look form 1982 up to now, the gaming industry have come a long way. Personally, I think it's fun to play old retro games such as Super Mario Bros. 1, Pacman and many other games that world-famous gaming characters were evolved from.