BleepingComputer.com: How can I connect my PC to TV via Wifi?

What I want to do is be able to control my PC from my TV screen. I mean I want to be able to stream a live ball game or movie I have on my PC hard drive & see it on my TV. I heard about Roku & thought that is what I wanted or Blueray with DLNA. But Roku just pulls streams from subscriber sites like Netflix & Hulu. DLNA will allow you to view video you have on your HDD but will not let you stream live feeds like watching a live event that is streaming on your PC. Is there any hardware out there that will allow me to have what’s on my PC screen on my TV screen via wifi (or other means)? Thanks!

After much research I've decided the best option would be:
http://www.amazon.com/Sony-SMP-N200-Streaming-Media-Player/dp/B005MR6CNK/ref=sr_1_1?ie=UTF8&qid=1324329032&sr=8-1

Its basically a DLNA capable Blueray machine without the disk player part. I have not played a actual DVD on my TV in ages. It will allow me to watch stuff I have on my PC & has internet, streaming options as well. Not 100% what I was shooting for but close enough. Thanks!