Yes but that is only if the service allows you to stream games that you bought else where. There are plenty of devs/publishers who disallow it and if a company wants to pay them for exclusivity they will certianly stop boosteroid from streaming say steam games they makeIt's boosteroid and they are a service like geforce now and not like gamepass/xcloud/psnow. You stream games you have bought elsewhere. They don't need to out bid/pay sony or ms they just need the EU ruling to be pushed to all publishers so if you have a license they don't need to then also get one from the publisher so you can use it on their service.
This part of the EU ruling is actually really good for the consumer if they can push it beyond ms/abk to all other publishers. Services like Geforce now and Boosteroid could have a market for people who want a streaming service with a little extra bang. Like the top tier geforce sub lets you use a 4080 and 4k 120fps streams, where if I use xcloud I get a console performance level experience so I think there is possibly room for both these methods.