I purchased by original Sling Classic in 2007. In 2010 I had to buy a HD Pro since sling was not going to support the classic on Android and IoS. Now support for Chromecast has been released - a great thing. But am I reading the announcement correctly? This only works on a limited number of the newest slingboxes and the HD Pro is not listed. Seems like I have to buy a new one every 3-4 years. Can anyone clarify this? Thanks.