Web Presenter: computer requirements/wish list

I would like to dedicate a computer to streaming using OBS using Web Presenter. If Web Presenter is doing the heavy lifting so to speak just how powerful a computer does one need for the stream? Portability is a must so I considered going with a competitive product that takes HDMI and streams it without the need for a computer. The device in question only supports 1 device without using a switcher/scaler which adds cost and complication. Which is why I'm looking for a computer solution to Web Presenter or alternately a non computer solution to connecting to YouTube Live from the Web Presenter. Anyone know of a low cost solution?

If Black magic is listening here is a wish list for the next version of Web Presenter:
Option to connect directly to net YouTube/Facebook no computer needed
allows at least 2 inputs 4 would be great!
Ability to load a static overlay to brand the output
1080P capable

There's been a few posts recently relating to a 'bug' with this setup where the WPs image is showing cropped in the final stream. You might want to follow that thread before making a final purchase.