There are number of ways to do this, although they may not provide what you want.

First of all, a great many televisions today have WiFi built in, which allows you to wirelessly connect them to your home network, and thus to your computer. So do many new Blu-ray players--and they're a great deal cheaper than HDTVs. But is WiFi really your best option?

Depending on your home's geography, WiFi may not be reliable enough for quality streaming video. If it isn't, consider using Ethernet. All of the TVs and Blu-ray players that support WiFi, and many that don't, have Ethernet. If stringing an Ethernet cable from your router to your TV isn't practical, devices--which use your home's electric grid to transmit data--can easily give you an Ethernet connection to any room in your home.

You probably already know that,--however they're connected--networked HDTVs and Blu-ray players can play Internet streaming video. Virtually all of them offer Netflix. Many have YouTube, Pandora, and at least one pay-per-view service. Newer ones are including Hulu Plus.

Most of them can also play videos and music, and display photos, off of any computer on the network. The computer has to be running DLNA server software, but that's not difficult. Windows Media Player--which comes bundled with Windows--is such a server.