Military – it is probable that Russia will continue to suffer losses as NATO provides better weapons. So continued conflict will be attrition.
Economic – long term it may be that the west decarbonises and Russian income from the EU plummets. This will not happen quickly, but is likely over next year.
Social – young Russians are unlikely to support the war and this may become more common. Will the poorer areas of Russia be willing to provide soldiers for Putins ego trip, especially as the body bags return?
End result is probably years away, but Crimea likely to remain Russian – the rest of the eastern area of Ukraine seems likely to be questionable – Russian speaking but not necessarily pro-Putin. (A bit like many parts of the UK which are English speaking but not English nationalists).