Just my guess
I think this whole Europa as VST and Web app thing was mostly directed to developers, not to Reason users really - "Look, we have the technology to convert our REs into VSTs and soon into web apps. Come join us!" Now I don't know how automated this process is, but it's not impossible that this can be done with minimal involvement from the developer. Imagine, if developer could do an RE, which would be then "converted" by Props to VST, Web, maybe AU and other formats too. What if Props are working on a system, where all your VSTs - bought from their store - are always kept up to date and licensed from single place, like we now have with REs? That's a really tempting prospect for developers. And not an impossible one. If I was Props and/or their investor, I'd find such a vision very appealing.
So my thinking is that it's not about releasing more REs and Reason devices as VSTs. It's about getting more developers on board the RE train, but still giving them a way to release VSTs and a platform the sell the through and maintain licenses & updates for the user. If that works, that's a win-win for both sides and - business-wise - it could be huge for Props.
Considering it's you - as a RE developer yourself - who's asking the question, I realise I might be dead wrong ...or that they're in early stages of the project and just wanted to test the waters, see the feedback from development community, etc.