You will first need a wireless PC to TV device. http://askbobrankin.com/howto_connect_your_pc_to_tv_wirelessly.html
HDTV is starting to become more widely available. I would contact your local cable or satellite provider after looking online. They should have all the information you need.
Buy an HDTV.
The LCD tv market is supposedly rumored to be worth about $100 billion dollars. Apple does invest in internet HDTV pretty heavily, however, from the research I found, they have invested about $3.9 billion dollars of their money into this project. http://www.appleinsider.com/articles/11/04/13/evidence_points_toward_apple_releasing_hdtv_this_year_report.html
The Samsung hdtv and the Sony hdtv are among the top quality televisions in the hdtv sector. The only difference between these televisions are the features they offer.
If it has HDMI connectors you have a HDTV.
Vizio Internet Apps provide you with quick access to online sites, such as Facebook, YouTube, Netflix, and any other website of your choosing, to be directly brought to you through your HDTV.
Plug it into your TV with the cable that came with it or if you have a HDTV buy a HDMI cable and plug that into your HDTV and PS3.. Plug the power in and turn it on. You should see it on your TV screen and if not turn your TV to the same input you plugged the PS3 into. Owners of the 720P HDTVs or those without HDMI can buy PS3 component cables with 5 color coded connections that use RCA plugs for the HDTV inputs. Both the HDTV 1080p and 720 HDTV owners can connect with the A/V cable that came with the PS3, but then it will be standard 480i from your PS3
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For your PS3 connection you need WiFi or an ethernet cable that is connected to the internet. The HDMI cable only connects the PS3 to the HDTV and will not provide the internet connection.
You don't. You either connect the PS3 to your HDTV with HDMI and the Comcast box to your HDTV with HDMI cables like I used to have or you connect the PS3 and Comcast Box with HDMI cables like I did to my home theater and then connect the home theater to the HDTV with a HDMI cable. My Comcast box is HD and I have a Sony HDTV and Sony Home Theater equipped with a HDMI repeater. If you are talking about connection for the internet it is not done with a HDMI cable, but an ethernet cable
HDTV = High Definition Television