Can this be done?? Actually it can – if your media centre is connected to a network with wif-fi capability.
I must stress here that I do NOT advocate a media center using wi-fi – it is flaky at best and is horrendously difficult to get working when the media centre is located next to or under a plasma TV. Plasma TVs have a lot of interference behind the screen which disrupt wi-fi signals.
But if your network has wi-fi you can use your smart phone or tablet to control, or even view, content on the media centre. This came about from a client request.
Control. Using my iPhone 4S I have been able to effectively control the media centre without using the TV. This is achieved by creating a remote desktop session on the iPhone giving me access to the media centre ON THE PHONE. To do this you need to use the iPhone/iPad app – Splashtop Remote Desktop. You can read about it at their site: www.splashtop.com/remote. It is available for Android, iOS, HP Touchpad, Kindle and Nook devices.
Basically you install a small piece of software on the Media Centre and then install the app on your phone/tablet. The device app pings the wifi network to find the Media Centre and once connected you get complete access.
Streaming. The software will allow you to stream media from the Media Centre to your device, however:
1. Device speakers do not have good fidelity – that’s why you have a media centre right? – so listening to music is going to be tinny at best. Having said that you could use a dock speakers, but this is not ideal.
2. Streaming hi-def content via wi-fi is not ideal. The system will downscale content to match your phone/tablet, but again if you wanted to watch hi-def content, that’s why you have a nice big flat screen TV, right? But there are scenarios where you might want to watch a tv show on your tablet: You’re in the kitchen cooking trying to recall that recipe your saw on your favourite cooking show. Why not watch the episode on your tablet, pausing when and where you like? Didn’t quite get the instructions? Rewind and watch it again.
Anyway, the real reason for doing this is to control your media centre with out turning on the TV and for this Splashtop is excellent.

