Just download the app here*, grab a compatible controller (we recommend the DS4 [obvs] for full features), hook it up to your PC and start your free trial or subscription. If you already have a PS Now subscription via one of our other compatible devices, then you can continue the fun at no extra cost on even more platforms! To get all the details, check out our FAQs here.

If you’re new to PlayStation Now then find out all about it here - with over 300 classic games for just £12.99 a month you’re sure to have a gaming extravaganza.

*This service is currently available in the United Kingdom, the Netherlands and Belgium.

https://blog.eu.playstation.com/2016/08/24/you-can-now-stream-classic-playstation-games-to-your-pc-via-ps-now/

https://www.playstation.com/en-gb/explore/playstation-now/ps-now-on-pc/

They do ip filtering so you need an up coming from these countries.
I will download it tomorrow to do some analysis on the binary but thanks god you can use a360 controller for that.
Looking forward to hear about impressions about how much lag there is and how the compressed images hold up on a 1080p tv.

That's fast, they released it for Belgium on PS4 like a month ago and now it is one of the first markets on pc? Not that I am complaining =p.

So the app says that the minimum requirement would be 5 mbit internet access and a "compatible controller",
while "high performance" would be 12mbps and DS4 (lol, "performance").
Further details:
I could use the app while in Germany - if anyone is interested in trying out the app, contact me.
I couldn't actually stream because they required me to add payment information for the free trial and didn't accept my paypal details.
What I found out was that for the connection test, they use the following ips:

100.42.108.79
100.42.96.17

Both IPs are ARIN IPs so they belong to the US which seems odd because I would've thought that they would do a bandwidth test with a datacenter nearby instead of using servers in the US.
But of course that doesn't mean that they also use US servers for the actual streaming because that would be incredibly dumb as this would result in >100 ms rtt.

The app itself isn't that bad but you can't actually even search for a game?! I mean, WTF? You have to scroll like crazy through all what is available. This is not really consumer friendly.

edit: whois information (strange to see that there is still Gaikai registered at Arin...)

whois 100.42.96.17

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/public/whoisinaccuracy/index.xhtml
#


#
# The following results may also be obtained via:
# https://whois.arin.net/rest/nets;q=100.42.96.17?showDetails=true&showARIN=false&showNonArinTopLevelNet=false&ext=netref2
#

NetRange:       100.42.96.0 - 100.42.111.255
CIDR:           100.42.96.0/20
NetName:        GAIKAI-1
NetHandle:      NET-100-42-96-0-1
Parent:         NET100 (NET-100-0-0-0-0)
NetType:        Direct Assignment
OriginAS:       AS33353
Organization:   Gaikai, Inc. (GAIKA-1)
RegDate:        2011-11-29
Updated:        2012-02-24
Ref:            https://whois.arin.net/rest/net/NET-100-42-96-0-1


OrgName:        Gaikai, Inc.
OrgId:          GAIKA-1
Address:        65 Enterprise
City:           Aliso Viejo
StateProv:      CA
PostalCode:     92656
Country:        US
RegDate:        2010-05-27
Updated:        2011-11-09
Ref:            https://whois.arin.net/rest/org/GAIKA-1


OrgTechHandle: ARINA92-ARIN
OrgTechName:   ARIN-ADMIN
OrgTechPhone:  +1-949-330-6950
OrgTechEmail:  arin-contact@gaikai.com
OrgTechRef:    https://whois.arin.net/rest/poc/ARINA92-ARIN

OrgAbuseHandle: ARINA92-ARIN
OrgAbuseName:   ARIN-ADMIN
OrgAbusePhone:  +1-949-330-6950
OrgAbuseEmail:  arin-contact@gaikai.com
OrgAbuseRef:    https://whois.arin.net/rest/poc/ARINA92-ARIN