Chromecast vs. HDMI cable?

Can anyone tell me the difference in using the two on my tablet or galaxy s3??

Source: http://ninjashoes.net/forum/showthread.php?82421-Chromecast-vs-HDMI-cable&goto=newpost

Murilo Bustamante  Grant Campbell  Gesias JZ Calvancante  Luiz Cane  Dos Caras Jr