In the case of Philips, they are clearly still in the business of making remotes, with new models introduced in 2012.  Of course, I don't know when they may discontinue the Prestigo SRT8215, but they did just update the advertising flyer for it, dated June 7.

I'm less sure of the Xsight line of remotes, but I can tell you that these remotes use the same processor and internal firmware structure as most of UEI's recent remotes.  There's plenty of economic and technical scale to support the line.

Neither company seems to be supporting higher end remotes or ones that would appeal to a CI, since the remotes have street (internet) prices under $100.