Yes, I maybe more likely to buy a TV from a brand like TCL, Insignia, and Hisense if it had a Roku Settop box built-in. A Roku is useful for watching online video.
Most likely, the TV are good enough for watching online video with the Roku, and video from a DVD/Blu-Ray player.
TCL is a less popular brand than Sony. But, TCL TV prices are more affordable. You can buy a 40 inch TCL Roku 1080P TV for $270 which seems like a good price.
You also may save $40 by not needing to buy a seperate Roku which cost around $40 for the cheapest Roku model.
TCL Roku TV also has a lot of good reviews online on sites like Amazon and Walmart.com.