I think people that have low power machines will also have slow internet (with exceptions, of course)
Their cheapest seat has 5gb ram. If I had a laptop with 8gb RAM I would consider it under powered.
If I had 4gb, as low as tolerable, why would I pay a premium for 1gb extra with a likely probably throttled CPU.
So I guess this may be aimed at a similar niche – laptop not enough to run everything well, but the most important things, and use such a service for the occasional peek into a CAD file or the like. Pricing would still turn me off, but I'm certainly not their target audience.